public static boolean deleteFiles(String storageFilePath) {
    final File recordsFile = new File(storageFilePath + INDEX_EXTENSION);
    final File dataFile = new File(storageFilePath + DATA_EXTENSION);

    // ensure both files deleted
    final boolean deletedRecordsFile = FileUtil.delete(recordsFile);
    final boolean deletedDataFile = FileUtil.delete(dataFile);
    return deletedRecordsFile && deletedDataFile;
  }
public static boolean deleteFiles(String storageFilePath)