diff -r 751e1d3a8c65 java.hints/src/org/netbeans/modules/java/hints/FieldForUnusedParam.java
--- a/java.hints/src/org/netbeans/modules/java/hints/FieldForUnusedParam.java	Sat Apr 11 01:04:14 2009 +0200
+++ b/java.hints/src/org/netbeans/modules/java/hints/FieldForUnusedParam.java	Sun Apr 12 01:51:04 2009 +0100
@@ -85,7 +85,7 @@
  */
 public class FieldForUnusedParam implements TreeRule {
 
-    private AtomicBoolean cancel = new AtomicBoolean();
+    private final AtomicBoolean cancel = new AtomicBoolean();
     
     public Set<Kind> getTreeKinds() {
         return EnumSet.of(Kind.VARIABLE);
@@ -165,7 +165,7 @@
         if (cancel.get() || found) {
             return null;
         }
-        
+
         List<Fix> fix = Collections.<Fix>singletonList(new FixImpl(info.getJavaSource(), TreePathHandle.create(treePath, info), existing));
         String displayName = NbBundle.getMessage(FieldForUnusedParam.class, "ERR_UnusedParameter");
         ErrorDescription err = ErrorDescriptionFactory.createErrorDescription(Severity.HINT, displayName,fix, info.getFileObject(), offset, offset);
@@ -232,7 +232,7 @@
                     }
                     
                     if (!existing) {
-                        VariableTree field = make.Variable(make.Modifiers(EnumSet.of(Modifier.PRIVATE)), vt.getName(), vt.getType(), null);
+                        VariableTree field = make.Variable(make.Modifiers(EnumSet.of(Modifier.PRIVATE, Modifier.FINAL)), vt.getName(), vt.getType(), null);
                         int insertPlace = -1;
                         
                         index = 0;
diff -r 751e1d3a8c65 java.hints/src/org/netbeans/modules/java/hints/errors/CreateElement.java
--- a/java.hints/src/org/netbeans/modules/java/hints/errors/CreateElement.java	Sat Apr 11 01:04:14 2009 +0200
+++ b/java.hints/src/org/netbeans/modules/java/hints/errors/CreateElement.java	Sun Apr 12 01:51:04 2009 +0100
@@ -378,6 +378,9 @@
                     if (target.getKind() == ElementKind.ENUM) {
                         result.add(new CreateEnumConstant(info, simpleName, modifiers, target, type, targetFile));
                     } else {
+                        if (firstMethod != null && info.getTrees().getElement(firstMethod).getKind() == ElementKind.CONSTRUCTOR ) {
+                            modifiers.add(Modifier.FINAL);
+                        }
                         result.add(new CreateFieldFix(info, simpleName, modifiers, target, type, targetFile));
                     }
                 }