public static void main(String[] args) { EntityManagerFactory factory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME); EntityManager em = factory.createEntityManager(); if (em.isOpen()) System.out.println("haha"); em.getTransaction().begin(); Personnel p = new Personnel(); p.setNom("test"); p.setPrenom("test2"); p.setFonction("test3"); p.setNaissance("naissance"); em.persist(p); em.getTransaction().commit(); em.close(); }