@Override public boolean delete(Long id) { contRepository.delete(id); return true; }
@Override public List<Contribution> findAllConts() { return contRepository.findAll(); }
@Override public Contribution getOneCont(Long id) { return contRepository.getOne(id); }
@Override public Contribution addNewCont(Contribution contribution) { Contribution newCont = contRepository.save(contribution); return newCont; }