/**
   * check the existence of the given word in the index
   *
   * @param indexPath index path's
   * @param word String to check
   * @return
   * @throws IOException
   */
  private boolean checkExistingWord(String indexPath, String word) throws IOException {

    File file = new File(indexPath);
    FSDirectory directory = FSDirectory.getDirectory(file);
    SpellChecker spellChecker = new SpellChecker(directory);
    return spellChecker.exist(word);
  }