@Override
  public void logDeletedFiles(Collection<String> paths) {
    if (paths.isEmpty()) return;
    final String[] buffer = new String[paths.size()];
    int i = 0;
    for (final String o : paths) {
      buffer[i++] = o;
    }
    Arrays.sort(buffer);
    logLine("Cleaning output files:");
    for (final String o : buffer) {
      logLine(o);
    }
    logLine("End of files");
  }
@Override
  public void logDeletedFiles(Collection<String> paths)