diff -r 000000000000 -r 6474c204b198 build/mobile/robocop/RoboCopException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/mobile/robocop/RoboCopException.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko;
+
+public class RoboCopException extends RuntimeException {
+    
+    public RoboCopException() {
+        super();
+    }
+    
+    public RoboCopException(String message) {
+        super(message);
+    }
+    
+    public RoboCopException(Throwable cause) {
+        super(cause);
+    }
+    
+    public RoboCopException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}