add Override comment

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1135527 13f79535-47bb-0310-9956-ffa450edef68

lucene/src/java/org/apache/lucene/store/OutputStreamDataOutput.java

@@ -39,6 +39,7 @@ public class OutputStreamDataOutput extends DataOutput implements Closeable {
     os.write(b, offset, length);
   }
 
+  // @Override -- not until Java 1.6
   public void close() throws IOException {
     os.close();
   }