docs: public void putObject(String bucketName, String objectName, String fileName)
      throws InvalidBucketNameException, NoSuchAlgorithmException,  IOException,
             InvalidKeyException, NoResponseException, XmlPullParserException, ErrorResponseException,
             InternalException,
             InvalidArgumentException, InsufficientDataException {
      putObject(bucketName, objectName, fileName, null);
    }