@Override public CommandProcessingResult deleteEventValidation(Long id) { try { this.context.authenticatedUser(); final EventValidation event = this.eventValidationRepository.findOne(id); if (event == null) { throw new EventValidationNotFoundException(id.toString()); } event.delete(); this.eventValidationRepository.save(event); return new CommandProcessingResult(id); } catch (Exception exception) { return null; } }