Ainda hibernate

@Entity
@Table(name = "Usuarios")
public class Usuario implements Serializable {
	@Id
	@Column(name = "id_usuario", nullable = false)
	@GeneratedValue(strategy = GenerationType.AUTO)
	private Integer id_usuario;

	@ManyToOne(fetch=FetchType.EAGER)
	@JoinColumn(name = "id_Empresa")
	private Empresa empresa;

	@Column(name = "email", nullable = true)
	private String email;

	@Column(name = "nome", nullable = true)
	private String nome;
}


@Entity
@Table(name = "Empresa")
public class Empresa implements Serializable{
	
	@Id @Column(name = "id_Empresa", nullable = false)
	private Integer id_Empresa;

	@Column(name = "nome", nullable = true)
	private String nome;
	
	@OneToMany(mappedBy="empresa", fetch=FetchType.LAZY)
	@JoinColumn(name="id_Empresa")
	private Collection<Usuario> lstUsuarios;
}


Método do DAO:

    public List<T> findByTeste(final T example)  {
        Criteria criteria = getSession().createCriteria(example.getClass());
        criteria.add(Example.create(example));
        final List<T> result = criteria.list();
        return result;
    }