@Override
public void save(T object) {
    entityManager.persist(object);
}

protected EntityManager entityManager;

@PersistenceContext
public void setEngityManager(EntityManager entityManger) {
    this.entityManager = entityManager;
}

setEntityManager

setEngityManager

@PersistenceContext(unitName="your_unit_name")
private EntityManager em;

private EntityManagerFactory emf;

public static EntityManagerFactory getEntityManagerFactory() {
    if (emf == null) {
        emf = Persistence.createEntityManagerFactory("your_unit_name");
    }
    return emf;
}

public static EntityManager getEntityManager() {
    EntityManager entityManager = null;
    if (null != emf)
           entityManager = emf.createEntityManager();

    return entityManager;
}