Models cannot be final because of NullModels

Models/Department.php

@@ -24,7 +24,7 @@ use phpOMS\Contract\ArrayableInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Department implements ArrayableInterface, \JsonSerializable
+class Department implements ArrayableInterface, \JsonSerializable
 {
     /**
      * Article ID.

Models/NullDepartment.php

@@ -22,6 +22,6 @@ namespace Modules\Organization\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class NullDepartment extends Department
+class NullDepartment extends Department
 {
 }

Models/NullPosition.php

@@ -22,6 +22,6 @@ namespace Modules\Organization\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class NullPosition extends Position
+class NullPosition extends Position
 {
 }

Models/NullUnit.php

@@ -22,6 +22,6 @@ namespace Modules\Organization\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class NullUnit extends Unit
+class NullUnit extends Unit
 {
 }

Models/Position.php

@@ -24,7 +24,7 @@ use phpOMS\Contract\ArrayableInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Position implements ArrayableInterface, \JsonSerializable
+class Position implements ArrayableInterface, \JsonSerializable
 {
     /**
      * Article ID.

Models/Unit.php

@@ -24,7 +24,7 @@ use phpOMS\Contract\ArrayableInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Unit implements ArrayableInterface, \JsonSerializable
+class Unit implements ArrayableInterface, \JsonSerializable
 {
     /**
      * Article ID.