diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/Cages.java b/eo-runtime/src/main/java/EOorg/EOeolang/Cages.java
index 16567cdde4..c4a2c5b304 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/Cages.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/Cages.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import java.util.concurrent.ConcurrentHashMap;
 import org.eolang.ExFailure;
@@ -46,13 +47,13 @@ final class Cages {
     /**
      * Encaged objects.
      */
-    private final ConcurrentHashMap<Integer, Phi> objects = new ConcurrentHashMap<>(0);
+    private final ConcurrentHashMap<Integer, Phi> objects;
 
     /**
      * Ctor.
      */
     private Cages() {
-        // singleton :(
+        this.objects = new ConcurrentHashMap<>(0);
     }
 
     /**
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOas_phi.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOas_phi.java
index df3842d161..fe6688fc6d 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOas_phi.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOas_phi.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -47,6 +48,7 @@ public final class EOas_phi extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOas_phi() {
         this.add("x", new AtVoid("x"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOand.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOand.java
index eccbfe9377..253149045c 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOand.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOand.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +46,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.and")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOand extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOand() {
         this.add("b", new AtVoid("b"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOconcat.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOconcat.java
index c99c1ffa9a..8c6d8f9551 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOconcat.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOconcat.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +46,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.concat")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOconcat extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOconcat() {
         this.add("b", new AtVoid("b"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOeq.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOeq.java
index 614a82c829..85e02842df 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOeq.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOeq.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import java.util.Arrays;
 import org.eolang.AtVoid;
@@ -46,10 +47,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.eq")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOeq extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOeq() {
         this.add("b", new AtVoid("b"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOor.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOor.java
index 566304f10a..8ff8b6465d 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOor.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOor.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +46,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.or")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOor extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOor() {
         this.add("b", new AtVoid("b"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOright.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOright.java
index 0edb6ce9fd..ce96546879 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOright.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOright.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +46,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.right")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOright extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOright() {
         this.add("x", new AtVoid("x"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOsize.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOsize.java
index b3025fd4c5..a2751a1689 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOsize.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOsize.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.Atom;
 import org.eolang.Attr;
@@ -44,6 +45,7 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.size")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOsize extends PhDefault implements Atom {
     @Override
     public Phi lambda() {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOslice.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOslice.java
index f33f9ec29f..ab50f93dc5 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOslice.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOslice.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import java.util.Arrays;
 import org.eolang.AtVoid;
@@ -46,10 +47,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.slice")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOslice extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOslice() {
         this.add("start", new AtVoid("start"));
         this.add("len", new AtVoid("len"));
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOxor.java b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOxor.java
index 4d3de028c7..cbb9336a44 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOxor.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EObytes$EOxor.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +46,12 @@
  */
 @Versionized
 @XmirObject(oname = "bytes.xor")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EObytes$EOxor extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EObytes$EOxor() {
         this.add("b", new AtVoid("b"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EOencaged$EOencage.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EOencaged$EOencage.java
index c7784dcde3..13e365f686 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EOencaged$EOencage.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EOencaged$EOencage.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -44,10 +45,12 @@
  */
 @Versionized
 @XmirObject(oname = "cage.encaged.encage")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOcage$EOencaged$EOencage extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     EOcage$EOencaged$EOencage() {
         this.add("object", new AtVoid("object"));
     }
diff --git "a/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EO\317\206.java" "b/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EO\317\206.java"
index 48170b0770..9f7e0229a9 100644
--- "a/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EO\317\206.java"
+++ "b/eo-runtime/src/main/java/EOorg/EOeolang/EOcage$EO\317\206.java"
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.Atom;
 import org.eolang.Attr;
@@ -42,6 +43,7 @@
  */
 @Versionized
 @XmirObject(oname = "cage.@")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOcage$EOφ extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOdataized.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOdataized.java
index 560c4a2656..6d254c8fe4 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOdataized.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOdataized.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -46,6 +47,7 @@ public final class EOdataized extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOdataized() {
         this.add("target", new AtVoid("target"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOmade$EOmkdir.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOmade$EOmkdir.java
index f7d6a0a4f7..d2ab169673 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOmade$EOmkdir.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOmade$EOmkdir.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Paths;
 import org.eolang.Atom;
@@ -43,6 +44,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "dir.made.mkdir")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOdir$EOmade$EOmkdir extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOtmpfile$EOtouch.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOtmpfile$EOtouch.java
index 67c5c82f79..1c83a88679 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOtmpfile$EOtouch.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOdir$EOtmpfile$EOtouch.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -45,6 +46,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "dir.tmpfile.touch")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOdir$EOtmpfile$EOtouch extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOexists.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOexists.java
index 7ae74a7ff0..c3a201e2bd 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOexists.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOexists.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Files;
 import java.nio.file.Paths;
@@ -44,6 +45,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "file.exists")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOfile$EOexists extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOmoved$EOmove.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOmoved$EOmove.java
index 7830c7de2b..bade501019 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOmoved$EOmove.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOmoved$EOmove.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -45,6 +46,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "file.moved.move")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOfile$EOmoved$EOmove extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes.java
index e07418650a..ce4d068bce 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Paths;
 import org.eolang.AtVoid;
@@ -44,6 +45,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "file.open.file-stream.write.written-bytes")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes
     extends PhDefault
     implements Atom {
@@ -51,6 +53,7 @@ public final class EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOfile$EOopen$EOfile_stream$EOwrite$EOwritten_bytes() {
         this.add("buffer", new AtVoid("buffer"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOprocess_file.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOprocess_file.java
index ecb25cbfd7..928ba0f7cb 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOprocess_file.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOopen$EOprocess_file.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Paths;
 import org.eolang.Atom;
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOresolved$EOresolve.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOresolved$EOresolve.java
index b4c89adb45..d391dda411 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOresolved$EOresolve.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOresolved$EOresolve.java
@@ -24,12 +24,11 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
-import java.nio.file.Files;
 import java.nio.file.Paths;
-import java.util.Arrays;
 import org.eolang.Atom;
 import org.eolang.Attr;
 import org.eolang.Data;
@@ -45,6 +44,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "file.resolved.resolve")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOfile$EOresolved$EOresolve extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOsize.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOsize.java
index 6f28e32b1e..177795ab1a 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOsize.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOsize.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.io.File;
 import org.eolang.Atom;
@@ -43,6 +44,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "file.size")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOfile$EOsize extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOtouched$EOtouch.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOtouched$EOtouch.java
index 70d5952c32..647dc3b067 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOtouched$EOtouch.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/EOfile$EOtouched$EOtouch.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.nio.file.Paths;
 import org.eolang.Atom;
@@ -43,6 +44,7 @@
  * @checkstyle TypeNameCheck (100 lines)
  */
 @XmirObject(oname = "file.touched.touch")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOfile$EOtouched$EOtouch extends PhDefault implements Atom {
     @Override
     public Phi lambda() throws Exception {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/Files.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/Files.java
index b713837d7d..cd00bd1722 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/Files.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/Files.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
 
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
@@ -52,13 +53,13 @@ final class Files {
     /**
      * File input streams for reading.
      */
-    private final ConcurrentHashMap<String, Object[]> streams = new ConcurrentHashMap<>(0);
+    private final ConcurrentHashMap<String, Object[]> streams;
 
     /**
      * Ctor.
      */
     private Files() {
-        // singleton :(
+        this.streams = new ConcurrentHashMap<>(0);
     }
 
     /**
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/package-info.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/package-info.java
index 756ccd05a3..e90ffe71be 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/package-info.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOfs/package-info.java
@@ -27,5 +27,6 @@
  *
  * @since 0.40
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOfs;
+package EOorg.EOeolang.EOfs; // NOPMD
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOread$EOread_bytes.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOread$EOread_bytes.java
index 443c703311..bf32646d9f 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOread$EOread_bytes.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOread$EOread_bytes.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOio;
+package EOorg.EOeolang.EOio; // NOPMD
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -47,6 +48,7 @@
  */
 @Versionized
 @XmirObject(oname = "console.read.read-bytes")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOconsole$EOread$EOread_bytes extends PhDefault implements Atom {
     /**
      * Input stream to read bytes from.
@@ -64,12 +66,14 @@ public final class EOconsole$EOread$EOread_bytes extends PhDefault implements At
      * Ctor for the tests.
      * @param input Stream to read from
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     EOconsole$EOread$EOread_bytes(final InputStream input) {
         this.input = input;
         this.add("size", new AtVoid("size"));
     }
 
     @Override
+    @SuppressWarnings("PMD.AssignmentInOperand")
     public Phi lambda() throws IOException {
         final int size = new Dataized(this.take("size")).asNumber().intValue();
         final byte[] read = new byte[size];
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOwrite$EOwritten_bytes.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOwrite$EOwritten_bytes.java
index c136e49006..7383380c9a 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOwrite$EOwritten_bytes.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOio/EOconsole$EOwrite$EOwritten_bytes.java
@@ -24,12 +24,12 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOio;
+package EOorg.EOeolang.EOio; // NOPMD
 
 import java.io.IOException;
 import java.io.OutputStream;
-import java.io.PrintStream;
 import org.eolang.AtVoid;
 import org.eolang.Atom;
 import org.eolang.Data;
@@ -47,6 +47,7 @@
  */
 @Versionized
 @XmirObject(oname = "console.write.written-bytes")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOconsole$EOwrite$EOwritten_bytes extends PhDefault implements Atom {
     /**
      * Stream to write out.
@@ -64,6 +65,7 @@ public final class EOconsole$EOwrite$EOwritten_bytes extends PhDefault implement
      * Ctor for the tests.
      * @param out Stream to print
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOconsole$EOwrite$EOwritten_bytes(final OutputStream out) {
         this.out = out;
         this.add("buffer", new AtVoid("buffer"));
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOio/package-info.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOio/package-info.java
index f15d02bbc9..81b4f11d47 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOio/package-info.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOio/package-info.java
@@ -27,5 +27,6 @@
  *
  * @since 0.1
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOio;
+package EOorg.EOeolang.EOio; // NOPMD
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOmalloc$EOof$EOallocated$EOread.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOmalloc$EOof$EOallocated$EOread.java
index ef45e70cea..ef0ee22d69 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOmalloc$EOof$EOallocated$EOread.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOmalloc$EOof$EOallocated$EOread.java
@@ -24,9 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +45,12 @@
  */
 @Versionized
 @XmirObject(oname = "malloc.of.allocated.read")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOmalloc$EOof$EOallocated$EOread extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     EOmalloc$EOof$EOallocated$EOread() {
         this.add("offset", new AtVoid("offset"));
         this.add("length", new AtVoid("length"));
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOfloor.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOfloor.java
index 789405d8b8..fa8d70a389 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOfloor.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOfloor.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.Atom;
 import org.eolang.Attr;
@@ -44,6 +45,7 @@
  */
 @Versionized
 @XmirObject(oname = "number.floor")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOnumber$EOfloor extends PhDefault implements Atom {
     @Override
     public Phi lambda() {
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOgt.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOgt.java
index 9d648d69c4..2236d7820d 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOgt.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOnumber$EOgt.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,10 +46,12 @@
  */
 @Versionized
 @XmirObject(oname = "number.gt")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOnumber$EOgt extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOnumber$EOgt() {
         this.add("x", new AtVoid("x"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java
index 56f2ddd5b2..0559c2ed06 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOrust.java
@@ -23,9 +23,10 @@
  */
 
 /*
- * @checkstyle PackageNameCheck (8 lines)
+ * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import java.io.ByteArrayInputStream;
 import java.io.File;
@@ -40,6 +41,7 @@
 import java.util.Arrays;
 import java.util.Base64;
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
@@ -67,6 +69,7 @@
  */
 @Versionized
 @XmirObject(oname = "rust")
+@SuppressWarnings("PMD.AvoidDirectAccessToStaticFields")
 public final class EOrust extends PhDefault implements Atom {
 
     /**
@@ -78,12 +81,12 @@ public final class EOrust extends PhDefault implements Atom {
     /**
      * All phis indexed while executing of native method.
      */
-    private final Map<Integer, Phi> phis = new HashMap<>();
+    private final Map<Integer, Phi> phis;
 
     /**
      * Error that possibly was thrown while the native function execution.
      */
-    private final AtomicReference<Throwable> error = new AtomicReference<>();
+    private final AtomicReference<Throwable> error;
 
     static {
         try {
@@ -95,7 +98,7 @@ public final class EOrust extends PhDefault implements Atom {
             );
         }
         final String lib;
-        final String system = System.getProperty("os.name").toLowerCase();
+        final String system = System.getProperty("os.name").toLowerCase(Locale.ENGLISH);
         if (system.contains("win")) {
             lib = "common.dll";
         } else if (system.contains("nix") || system.contains("nux") || system.contains("aix")) {
@@ -130,7 +133,10 @@ public final class EOrust extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOrust() {
+        this.phis = new HashMap<>();
+        this.error = new AtomicReference<>();
         this.add("code", new AtVoid("code"));
         this.add("portal", new AtVoid("portal"));
         this.add("params", new AtVoid("params"));
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOslice.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOslice.java
index 49b7db85e4..b997b1fa93 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOslice.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOstring$EOslice.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -46,10 +47,12 @@
  */
 @Versionized
 @XmirObject(oname = "string.slice")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOstring$EOslice extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOstring$EOslice() {
         this.add("start", new AtVoid("start"));
         this.add("len", new AtVoid("len"));
@@ -57,22 +60,22 @@ public final class EOstring$EOslice extends PhDefault implements Atom {
 
     @Override
     public Phi lambda() {
-        final String str = new Dataized(this.take(Attr.RHO)).asString();
         final int start = new Dataized(this.take("start")).asNumber().intValue();
         final int length = new Dataized(this.take("len")).asNumber().intValue();
-        final int end = length + start;
         if (start < 0) {
             throw new ExFailure(
                 "Start index must be greater than 0 but was %d",
                 start
             );
         }
+        final int end = length + start;
         if (start > end) {
             throw new ExFailure(
                 "End index must be greater or equal to start but was %d < %d",
                 end, start
             );
         }
+        final String str = new Dataized(this.take(Attr.RHO)).asString();
         if (end > str.length()) {
             throw new ExFailure(
                 "Start index + length must not exceed string length but was %d > %d",
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOgetenv.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOgetenv.java
index 92446d50d5..cecbbe627a 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOgetenv.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOgetenv.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOsys;
+package EOorg.EOeolang.EOsys; // NOPMD
 
 import org.eolang.AtVoid;
 import org.eolang.Atom;
@@ -45,6 +46,7 @@ public final class EOgetenv extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOgetenv() {
         this.add("name", new AtVoid("name"));
     }
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOos$EOname.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOos$EOname.java
index ddded9b97b..b22c869a4d 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOos$EOname.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/EOos$EOname.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOsys;
+package EOorg.EOeolang.EOsys; // NOPMD
 
 import org.eolang.Atom;
 import org.eolang.Data;
@@ -39,6 +40,7 @@
  * @checkstyle TypeNameCheck (5 lines)
  */
 @XmirObject(oname = "os.name")
+@SuppressWarnings("PMD.AvoidDollarSigns")
 public final class EOos$EOname extends PhDefault implements Atom {
     /**
      * Operating system name as {@link Phi}.
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/package-info.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/package-info.java
index c68fca72e7..cb3e7227e0 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/package-info.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOsys/package-info.java
@@ -27,5 +27,6 @@
  *
  * @since 0.39
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOsys;
+package EOorg.EOeolang.EOsys; // NOPMD
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOtry.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOtry.java
index 6f447ce09e..5ced014c03 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOtry.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOtry.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import java.util.function.Consumer;
 import java.util.function.Function;
@@ -50,6 +51,7 @@ public final class EOtry extends PhDefault implements Atom {
     /**
      * Ctor.
      */
+    @SuppressWarnings("PMD.ConstructorOnlyInitializesOrCallOtherConstructors")
     public EOtry() {
         this.add("main", new AtVoid("main"));
         this.add("catch", new AtVoid("catch"));
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/EOtxt/package-info.java b/eo-runtime/src/main/java/EOorg/EOeolang/EOtxt/package-info.java
index fd3647da08..10dffc6cbe 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/EOtxt/package-info.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/EOtxt/package-info.java
@@ -27,5 +27,6 @@
  *
  * @since 0.39
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang.EOtxt;
+package EOorg.EOeolang.EOtxt; // NOPMD
diff --git a/eo-runtime/src/main/java/EOorg/EOeolang/Heaps.java b/eo-runtime/src/main/java/EOorg/EOeolang/Heaps.java
index 00ae973236..6299e58a5f 100644
--- a/eo-runtime/src/main/java/EOorg/EOeolang/Heaps.java
+++ b/eo-runtime/src/main/java/EOorg/EOeolang/Heaps.java
@@ -24,8 +24,9 @@
 
 /*
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg.EOeolang;
+package EOorg.EOeolang; // NOPMD
 
 import java.util.Arrays;
 import java.util.concurrent.ConcurrentHashMap;
@@ -49,14 +50,13 @@ final class Heaps {
     /**
      * All.
      */
-    private final ConcurrentHashMap<Integer, byte[]> blocks =
-        new ConcurrentHashMap<>(0);
+    private final ConcurrentHashMap<Integer, byte[]> blocks;
 
     /**
      * Ctor.
      */
     private Heaps() {
-        // intentionally empty, it's a singleton :(
+        this.blocks = new ConcurrentHashMap<>(0);
     }
 
     /**
diff --git a/eo-runtime/src/main/java/EOorg/package-info.java b/eo-runtime/src/main/java/EOorg/package-info.java
index 5e470d12a1..700acecdea 100644
--- a/eo-runtime/src/main/java/EOorg/package-info.java
+++ b/eo-runtime/src/main/java/EOorg/package-info.java
@@ -27,5 +27,6 @@
  *
  * @since 0.1
  * @checkstyle PackageNameCheck (4 lines)
+ * @checkstyle TrailingCommentCheck (3 lines)
  */
-package EOorg;
+package EOorg; // NOPMD