diff --git a/yearclass-sample/src/main/java/com/facebook/device/yearclass/sample/MainActivity.java b/yearclass-sample/src/main/java/com/facebook/device/yearclass/sample/MainActivity.java
index 4fb4b4c..cf1c8e1 100644
--- a/yearclass-sample/src/main/java/com/facebook/device/yearclass/sample/MainActivity.java
+++ b/yearclass-sample/src/main/java/com/facebook/device/yearclass/sample/MainActivity.java
@@ -14,6 +14,7 @@
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Bundle;
+import android.os.StrictMode;
 import android.widget.TextView;
 import com.facebook.device.yearclass.YearClass;
 
@@ -24,6 +25,18 @@ public class MainActivity extends Activity {
 
   @Override
   protected void onCreate(Bundle savedInstanceState) {
+    if (BuildConfig.DEBUG) {
+      StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
+              .detectAll()
+              .penaltyLog()
+              .build());
+      StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
+              .detectAll()
+              .penaltyLog()
+              .penaltyDeath()
+              .build());
+    }
+
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
 
diff --git a/yearclass/src/main/java/com/facebook/device/yearclass/DeviceInfo.java b/yearclass/src/main/java/com/facebook/device/yearclass/DeviceInfo.java
index ee9fd23..259d29a 100644
--- a/yearclass/src/main/java/com/facebook/device/yearclass/DeviceInfo.java
+++ b/yearclass/src/main/java/com/facebook/device/yearclass/DeviceInfo.java
@@ -68,6 +68,7 @@ private static int getCoresFromFileInfo(String fileLocation) {
       InputStream is = new FileInputStream(fileLocation);
       BufferedReader buf = new BufferedReader(new InputStreamReader(is));
       String fileContents = buf.readLine();
+      buf.close();
       return getCoresFromFileString(fileContents);
     } catch (IOException e) {
       return DEVICEINFO_UNKNOWN;