@Override
  public void put(K key, V value) {
    try {
      if (value == null) {
        myMap.remove(key);
      }
      else {
        myMap.put(key, value);
      }
    }
    catch (IOException e) {
      throw new BuildDataCorruptedException(e);
    }
  }
@Override
  public void put(K key, V value)