docs: public void createReference(Reference reference) throws GreenPepperServerException {
          try {
              sessionService.startSession();
              sessionService.beginTransaction();
  
              Repository repository = loadRepository(reference.getSpecification().getRepository().getUid());
  
  
              documentDao.createReference(reference);
  
              sessionService.commitTransaction();
              log.debug("Created Reference: " + reference.getRequirement().getName() + "," + reference.getSpecification().getName());
          } catch (Exception ex) {
              sessionService.rollbackTransaction();
              throw handleException(REFERENCE_CREATE_FAILED, ex);
          } finally {
              sessionService.closeSession();
          }
      }