hibernate-inheritance

In this HW you will have a practice with different inheritance strategies.

Action items:

- Fork the project. 
- Add required annotations in model classes. 
- Implement all methods in DAOs

Implement the following requirements:

1. There are classes: Animal, Cat and Dog. Both Cat and Dog extend Animal. Add the implementation of Single table inheritance strategy.

2. There are classes: Machine, Car and Truck. Both Car and Truck extend Machine. Add the implementation of Table per class inheritance strategy.

3. There are classes: Person, Coach and Mentor. Both Coach and Mentor extend Person. Add the implementation of Join tables inheritance strategy.

4. There are classes: Figure, Circle and Triangle. Both Circle and Triangle extend Figure. Add the implementation of Mapped Superclass inheritance strategy.

Implement all required methods in DAOs