@Entity
@Table( name = "T_TABLE_B" )
public class ClasseB implements Serializable
{
  @Id
  @GeneratedValue( strategy = GenerationType.IDENTITY )
  @Column( name = "B_ID" )
  private Long id;
  
  @Column( name = "B_REMARQUE" )
  private String remarque;

  @OneToOne
  @JoinColumn( name = "C_ID_FK" )
  private ClasseC attributC;
 ...