/*
  * Save the given configuration to disk.
  */
 public void save(String message, Configuration configuration) {
   File configLocation =
       new File(output, getRootFolder() + "configuration/org.eclipse.update/platform.xml");
   File installLocation = new File(output, getRootFolder());
   try {
     configuration.save(configLocation, installLocation.toURL());
   } catch (ProvisionException e) {
     fail(message, e);
   } catch (MalformedURLException e) {
     fail(message, e);
   }
 }