code: private void putPhoneNumberInBlackList(final String phoneNumber, final Application application ) {
  		// if phone number is not already in the bl (it should not append) put the phone number
  		// put the phone number in the black list
          if (daoService.isPhoneNumberInBlackList(phoneNumber)) return;
  				logger.debug("Adding to black list : \n" + 
  					     " - Phone number : " + phoneNumber + "\n" + 
  					     " - Application id : " + application.getId() + "\n");
  			
  			final Date currentDate = new Date(System.currentTimeMillis());
  			daoService.addBlacklist(new Blacklist(application, currentDate, phoneNumber));
  	}
docs: Put a number in black list.
  @param phoneNumber
  @param application