Change visibility to private

ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/EmploymentKey.java

@@ -12,10 +12,10 @@ import java.util.Objects;
 @Embeddable
 public class EmploymentKey implements IEmploymentKey, Serializable {
     @ManyToOne(targetEntity = Driver.class)
-    IDriver driver;
+    private IDriver driver;
 
     @ManyToOne(targetEntity = Organization.class)
-    IOrganization organization;
+    private IOrganization organization;
 
     public EmploymentKey() {
     }