code: public String encrypt(String clearText) throws MissingParameterException {
  
  		if (StringUtils.isBlank(clearText)) {
  			throw new MissingParameterException("Missing parameter: clearText");
  		}
  
  		return stringEncryptor.encrypt(clearText);
  	}
docs: Method which will encrypt a string.
  
  @param clearText
  Clear text to be encrypted.
  @return Encrypted text.
  @throws MissingParameterException