Refactoring int -> Integer pour les Id : Country

@@ -10,14 +10,14 @@ import javax.persistence.*;
 public class Country {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    private int countryId;
+    private Integer countryId;
     private String countryName;
 
-    public int getCountryId() {
+    public Integer getCountryId() {
         return countryId;
     }
 
-    public void setCountryId(int countryId) {
+    public void setCountryId(Integer countryId) {
         this.countryId = countryId;
     }