Add fields to the entities

Before mapping the entities to the database, you must add the necessary fields to each entity.

1. Add the following fields to the Employee entity:

   private Long id;
   private String firstNname;
   private String lastName;
   private String address;
   private List<PhoneNumber> phoneNumbers;
   private Long version;
   

2. Import java.util.List.

3. Generate Getters and Setters for each field.

4. Add the following fields to the Address entity:

   private Long id;
   private String street;
   private String city;
   private String stateOrProvince;
   private String country;
   private String postalCode;
   

5. Add the following fields to the PhoneNumber entity:

   private String type;
   private String areaCode;
   private String number;
   private Employee owner;
   

Next, you will Associate the entity with a database table.