UnidirectionalOneToOneOwned.class, 
            UnidirectionalOneToOneOwner.class);
        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        UnidirectionalOneToOneOwner owner = new UnidirectionalOneToOneOwner();
        owner.setMarker("Owner");
        UnidirectionalOneToOneOwned owned = new UnidirectionalOneToOneOwned();
        owned.setMarker("Owned");
        owner.setOwned(owned);
        em.persist(owner);
        em.getTransaction().commit();
        em.close();
    }