@MappedSuperclass
   class AbstractModel {
      @EmbeddedId
      private UUID id = UUID.randomUUID();
   }

   interface CarOwner {
   }

   @Entity
   class Person extends AbstractModel implements CarOwner {
      @OneToMany
      List<Car> cars = new ArrayList<Car>();
   }

   @Entity
   class Enterprise extends AbstractModel implements CarOwner {
      @OneToMany
      List<Car> cars = new ArrayList<Car>();
   }

   @Entity
   class Car {
      @ManyToOne
      private CarOwner owner;
   }