code: @Override
     protected URL createStorage() throws FileNotFoundException, IOException
     {
        FileNameProducer fnp =
           new FileNameProducer(config.getRepository(), config.getWorkspace(),
              PrivilegedFileHelper.getAbsolutePath(config.getBackupDir()), super.timeStamp, true, true);
  
        return new URL("file:" + PrivilegedFileHelper.getAbsolutePath(fnp.getNextFile()));
     }
docs: {@inheritDoc}