@Id
@Column(name = "calendario_id")
@GeneratedValue(strategy = GenerationType.AUTO)
private int calendario_id;

@Column(name = "ano")
private int ano;

@Column(name = "usuario_id")
private int usuario_id;

@OneToMany(mappedBy = "calendarioDatas")
@Cascade(org.hibernate.annotations.CascadeType.ALL)
private List<Datas> datasCalendario = new ArrayList<>();