@Entity
@Table(name = "users")
public class User {

@Id
@Column(name = "id", updatable = false, nullable = false)
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;

@Column(name = "login", nullable = false)
private String login;

@Column(name = "password", nullable = false)
private String password;

@Column(name = "role", nullable = false)
private String role;

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "idBacket")
private Backet backet;

public User() {
    super();
}

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

public String getLogin() {
    return login;
}

public void setLogin(String login) {
    this.login = login;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public Backet getBacket() {
    return backet;
}

public void setBacket(Backet backet) {
    this.backet = backet;
}

public String getRole() {
    return role;
}

public void setRole(String role) {
    this.role = role;
}
}

@Entity
@Table(name = "backets")
public class Backet {

@Id
@Column(name = "id", updatable = false, nullable = false)
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;

@Column(name = "idOrders")
private String idOrders;

@OneToOne(mappedBy = "backet")
private User user;

public Backet() {
    super();
}

public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

public String getIdOrders() {
    return idOrders;
}

public void setIdOrders(String idOrders) {
    this.idOrders = idOrders;
}

public User getUser() {
    return user;
}

public void setUser(User user) {
    this.user = user;
}
}

@Override
public int persist(Backet object) {
    Session session = factory.openSession();
    int id = 0;
    Transaction transaction = null;
    try{
        transaction = session.beginTransaction();
        id = (Integer) session.save(object);
        transaction.commit();
    }catch (HibernateException e) {
        if (transaction != null) {
            transaction.rollback();
        }
        logger.error(e);
    }finally {
        session.close();
    }
    return id;
}


@Override
public int persist(User object) {
    Session session = factory.openSession();
    int id = 0;
    Transaction transaction = null;
    try{
        transaction = session.beginTransaction();
        id = (Integer) session.save(object);
        transaction.commit();
    }catch (HibernateException e) {
        if (transaction != null) {
            transaction.rollback();
        }
      logger.error(e);
    }finally {
        session.close();
    }
    return id;
}

@Test
public void testDB() {
    Backet backet = new Backet();
    new BacketDao().persist(backet);
    User user = new User();
    user.setBacket(backet);
    user.setLogin("test");
    user.setPassword("test");
    user.setRole("test");
    int idUser = new UserDao().persist(user);
}