@AfterClass
  public void afterClass() throws IOException {
    buffer.close();

    deleteUsedFiles(FILE_COUNT);

    storageLocal.delete();
  }
  @BeforeMethod
  public void beforeMethod() throws IOException {
    if (buffer != null) {
      buffer.close();

      deleteUsedFiles(FILE_COUNT);
    }

    initBuffer();

    Random random = new Random();
    seed = (byte) (random.nextInt() & 0xFF);
  }