diff --git a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/DgcForeignRulesSyncer.java b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/DgcForeignRulesSyncer.java
index 01590880..0e484d2d 100644
--- a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/DgcForeignRulesSyncer.java
+++ b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/DgcForeignRulesSyncer.java
@@ -23,7 +23,6 @@
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Locale;
 import org.bouncycastle.cms.CMSException;
 import org.bouncycastle.operator.OperatorCreationException;
 import org.slf4j.Logger;
@@ -48,28 +47,24 @@ public int sync() {
         List<String> countries = dgcRulesClient.getCountries();
         countries.remove("CH");
         int successful = 0;
-        for(var country: countries){
+        for (var country : countries) {
             var rules = new ArrayList<ForeignRule>();
             var downloaded = dgcRulesClient.download(country);
-            downloaded.forEach( (id, ruleVersions) -> {
-                ruleVersions.forEach( version ->{
-                    try {
-                        rules.add(
-                                decodeRule(
-                                        (ObjectNode) version, country, id));
-                    } catch (Exception e) {
-                        logger.error(
-                                "Failed to decode rule {}",
-                                id,
-                                e);
-                    }
-                        }
-                );
-            });
+            downloaded.forEach(
+                    (id, ruleVersions) -> {
+                        ruleVersions.forEach(
+                                version -> {
+                                    try {
+                                        rules.add(decodeRule((ObjectNode) version, country, id));
+                                    } catch (Exception e) {
+                                        logger.error("Failed to decode rule {}", id, e);
+                                    }
+                                });
+                    });
 
-            if(rules.isEmpty()){
+            if (rules.isEmpty()) {
                 logger.error("No rules were downloaded or decoded for {}", country);
-            }else{
+            } else {
                 foreignRulesDataService.removeRuleSet(country);
                 rules.forEach(foreignRulesDataService::insertRule);
                 successful += rules.size();
@@ -77,7 +72,8 @@ public int sync() {
         }
         var end = Instant.now();
         logger.info(
-                "Successfully downloaded {} foreign rules {} ms", successful,
+                "Successfully downloaded {} foreign rules {} ms",
+                successful,
                 end.toEpochMilli() - start.toEpochMilli());
         return successful;
     }
@@ -85,16 +81,30 @@ public int sync() {
     private ForeignRule decodeRule(ObjectNode rule, String country, String id)
             throws CertificateException, IOException, OperatorCreationException, CMSException {
         var foreignRule = new ForeignRule();
-        String content = new String((byte[]) CmsUtil.decodeCms(rule.get("cms").asText()), StandardCharsets.UTF_8);
+        String content =
+                new String(
+                        (byte[]) CmsUtil.decodeCms(rule.get("cms").asText()),
+                        StandardCharsets.UTF_8);
         ObjectNode convertedNode = mapper.createObjectNode();
-        mapper.readTree(content).fields().forEachRemaining(field -> {
-            String fieldName = field.getKey().substring(0,1).toLowerCase().concat(field.getKey().substring(1));
-            convertedNode.set(fieldName, field.getValue());
-        });
+        mapper.readTree(content)
+                .fields()
+                .forEachRemaining(
+                        field -> {
+                            String fieldName =
+                                    field.getKey()
+                                            .substring(0, 1)
+                                            .toLowerCase()
+                                            .concat(field.getKey().substring(1));
+                            convertedNode.set(fieldName, field.getValue());
+                        });
         foreignRule.setContent(convertedNode.toString());
-        var validUntil = LocalDateTime.parse(rule.get("validTo").asText(), DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+        var validUntil =
+                LocalDateTime.parse(
+                        rule.get("validTo").asText(), DateTimeFormatter.ISO_OFFSET_DATE_TIME);
         foreignRule.setValidUntil(validUntil);
-        var validFrom = LocalDateTime.parse(rule.get("validTo").asText(), DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+        var validFrom =
+                LocalDateTime.parse(
+                        rule.get("validTo").asText(), DateTimeFormatter.ISO_OFFSET_DATE_TIME);
         foreignRule.setValidFrom(validFrom);
         foreignRule.setVersion(rule.get("version").asText());
         foreignRule.setCountry(country);
diff --git a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/ForeignRulesSyncTest.java b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/ForeignRulesSyncTest.java
index c378b58f..b8cdab74 100644
--- a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/ForeignRulesSyncTest.java
+++ b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-sync/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/sync/syncer/ForeignRulesSyncTest.java
@@ -11,13 +11,10 @@
 package ch.admin.bag.covidcertificate.backend.verifier.sync.syncer;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.springframework.test.web.client.match.MockRestRequestMatchers.method;
 import static org.springframework.test.web.client.match.MockRestRequestMatchers.requestTo;
 import static org.springframework.test.web.client.response.MockRestResponseCreators.withStatus;
 
-import ch.admin.bag.covidcertificate.backend.verifier.model.sync.CertificateType;
 import java.net.URI;
 import java.nio.file.Files;
 import java.nio.file.Path;
diff --git a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2.java b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2.java
index 069c13b8..97828ae7 100644
--- a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2.java
+++ b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/main/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2.java
@@ -18,16 +18,13 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import java.security.NoSuchAlgorithmException;
 import java.time.Instant;
-import java.time.temporal.ChronoUnit;
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.stream.Collectors;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.boot.actuate.autoconfigure.metrics.MetricsProperties.Web;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
diff --git a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2Test.java b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2Test.java
index bcd4bdf1..db385a5f 100644
--- a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2Test.java
+++ b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/controller/ForeignRulesControllerV2Test.java
@@ -16,11 +16,8 @@
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
 import ch.admin.bag.covidcertificate.backend.verifier.ws.util.TestHelper;
-import ch.admin.bag.covidcertificate.backend.verifier.ws.utils.EtagUtil;
-import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import java.util.Map;
-import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.springframework.http.MediaType;
diff --git a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/util/MockForeignRuleDataService.java b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/util/MockForeignRuleDataService.java
index 5a8850a6..8bfcb04f 100644
--- a/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/util/MockForeignRuleDataService.java
+++ b/ch-covidcertificate-backend-verifier/ch-covidcertificate-backend-verifier-ws/src/test/java/ch/admin/bag/covidcertificate/backend/verifier/ws/util/MockForeignRuleDataService.java
@@ -15,7 +15,7 @@ public class MockForeignRuleDataService implements ForeignRulesDataService {
     private final ForeignRule at1 = new ForeignRule();
     private final ForeignRule at2 = new ForeignRule();
 
-    public MockForeignRuleDataService(){
+    public MockForeignRuleDataService() {
         at1.setId("GR-AT-0039");
         at1.setVersion("0.0.1");
         at1.setCountry("AT");
@@ -38,22 +38,18 @@ public List<String> getCountries() {
 
     @Override
     public List<ForeignRule> getRulesForCountry(String country) {
-        if(country.equals("AT")){
+        if (country.equals("AT")) {
             return Arrays.asList(at1, at2);
-        }else if(country.equals("DE")){
+        } else if (country.equals("DE")) {
             return new ArrayList<>();
-        }else{
+        } else {
             return new ArrayList<>();
         }
     }
 
     @Override
-    public void insertRule(ForeignRule rule) {
-
-    }
+    public void insertRule(ForeignRule rule) {}
 
     @Override
-    public void removeRuleSet(String country) {
-
-    }
+    public void removeRuleSet(String country) {}
 }