--- a/langtools/test/tools/javac/lib/ToolBox.java	Fri Apr 18 08:44:53 2014 -0700
+++ b/langtools/test/tools/javac/lib/ToolBox.java	Mon Apr 21 17:57:47 2014 -0400
@@ -902,7 +902,9 @@
                       .append("Main-Class: ")
                       .append(mainClass).toString());
         }
-        Files.write(Paths.get("MANIFEST.MF"), lines, null);
+        Files.write(Paths.get("MANIFEST.MF"), lines,
+                    StandardOpenOption.CREATE, StandardOpenOption.WRITE,
+                    StandardOpenOption.TRUNCATE_EXISTING);
     }
 
     /**