diff --git a/src/main/java/de/maishai/Compiler.java b/src/main/java/de/maishai/Compiler.java
index 749afb5..9f2c4ca 100644
--- a/src/main/java/de/maishai/Compiler.java
+++ b/src/main/java/de/maishai/Compiler.java
@@ -90,7 +90,7 @@ public class Compiler {
         options.addOption("d", "debug", false, "Enable debug logging");
 
         CommandLineParser parser = new DefaultParser();
-        CommandLine cmd = null;
+        CommandLine cmd;
         try {
             cmd = parser.parse(options, args);
         } catch (ParseException e) {
diff --git a/src/main/java/de/maishai/typedast/MethodContext.java b/src/main/java/de/maishai/typedast/MethodContext.java
index 41b4e3b..3d31096 100644
--- a/src/main/java/de/maishai/typedast/MethodContext.java
+++ b/src/main/java/de/maishai/typedast/MethodContext.java
@@ -28,8 +28,7 @@ public class MethodContext {
     private final Deque<Label> continueLabels = new ArrayDeque<>();
 
     public MethodContext(ClassContext classContext, MethodVisitor mv, Type returnType) {
-        // if DEBUG env variable is set, log all method calls
-        if (System.getenv("DEBUG") != null) {
+        if (Objects.equals(System.getenv("DEBUG"), "true")) {
             this.mv = new LoggingMethodVisitor(mv);
         } else {
             this.mv = mv;
@@ -85,7 +84,6 @@ public class MethodContext {
     }
 
     public void wrapUp() {
-        //if return type is void, add return instruction
         if (returnType.getKind() == Type.Kind.VOID) {
             mv.visitInsn(Opcodes.RETURN);
         }