--- old/src/share/classes/java/io/Closeable.java	2013-02-05 13:59:11.000000000 -0800
+++ new/src/share/classes/java/io/Closeable.java	2013-02-05 13:59:10.000000000 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 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
@@ -34,7 +34,7 @@
  *
  * @since 1.5
  */
-
+@FunctionalInterface
 public interface Closeable extends AutoCloseable {
 
     /**