diff -r 4cf6e84f844f -r 267225edc1fe test/tools/javac/MethodParameters/AttributeVisitor.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/MethodParameters/AttributeVisitor.java	Wed Feb 20 15:47:14 2013 -0800
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import com.sun.tools.classfile.*;
+
+/**
+ * Trivial {@code Attribute.Visitor} implementation, to make it easy to
+ * write visitors for specific attributes.
+ */
+class AttributeVisitor<R, P> implements Attribute.Visitor<R, P> {
+    public R visitBootstrapMethods(BootstrapMethods_attribute attr, P p) { return null; }
+    public R visitDefault(DefaultAttribute attr, P p) { return null; }
+    public R visitAnnotationDefault(AnnotationDefault_attribute attr, P p) { return null; }
+    public R visitCharacterRangeTable(CharacterRangeTable_attribute attr, P p) { return null; }
+    public R visitCode(Code_attribute attr, P p) { return null; }
+    public R visitCompilationID(CompilationID_attribute attr, P p) { return null; }
+    public R visitConstantValue(ConstantValue_attribute attr, P p) { return null; }
+    public R visitDeprecated(Deprecated_attribute attr, P p) { return null; }
+    public R visitEnclosingMethod(EnclosingMethod_attribute attr, P p) { return null; }
+    public R visitExceptions(Exceptions_attribute attr, P p) { return null; }
+    public R visitInnerClasses(InnerClasses_attribute attr, P p) { return null; }
+    public R visitLineNumberTable(LineNumberTable_attribute attr, P p) { return null; }
+    public R visitLocalVariableTable(LocalVariableTable_attribute attr, P p) { return null; }
+    public R visitLocalVariableTypeTable(LocalVariableTypeTable_attribute attr, P p) { return null; }
+    public R visitMethodParameters(MethodParameters_attribute attr, P p) { return null; }
+    public R visitRuntimeVisibleAnnotations(RuntimeVisibleAnnotations_attribute attr, P p) { return null; }
+    public R visitRuntimeInvisibleAnnotations(RuntimeInvisibleAnnotations_attribute attr, P p) { return null; }
+    public R visitRuntimeVisibleParameterAnnotations(RuntimeVisibleParameterAnnotations_attribute attr, P p) { return null; }
+    public R visitRuntimeInvisibleParameterAnnotations(RuntimeInvisibleParameterAnnotations_attribute attr, P p) { return null; }
+    public R visitRuntimeVisibleTypeAnnotations(RuntimeVisibleTypeAnnotations_attribute attr, P p) { return null; }
+    public R visitRuntimeInvisibleTypeAnnotations(RuntimeInvisibleTypeAnnotations_attribute attr, P p) { return null; }
+    public R visitSignature(Signature_attribute attr, P p) { return null; }
+    public R visitSourceDebugExtension(SourceDebugExtension_attribute attr, P p) { return null; }
+    public R visitSourceFile(SourceFile_attribute attr, P p) { return null; }
+    public R visitSourceID(SourceID_attribute attr, P p) { return null; }
+    public R visitStackMap(StackMap_attribute attr, P p) { return null; }
+    public R visitStackMapTable(StackMapTable_attribute attr, P p) { return null; }
+    public R visitSynthetic(Synthetic_attribute attr, P p) { return null; }
+}