Models cannot be final because of NullModels

Models/Balance.php

@@ -24,7 +24,7 @@ use phpOMS\Utils\IO\ExchangeInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Balance
+class Balance
 {
 
     /**

Models/BatchPosting.php

@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class BatchPosting implements \Countable
+class BatchPosting implements \Countable
 {
 
     /**

Models/Creditor.php

@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Creditor
+class Creditor
 {
 
     /**

Models/Debitor.php

@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class Debitor
+class Debitor
 {
 
     /**

Models/ImpersonalAccount.php

@@ -24,7 +24,7 @@ use phpOMS\Utils\IO\ExchangeInterface;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class ImpersonalAccount
+class ImpersonalAccount
 {
 
     /**

Models/IncomeStatement.php

@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class IncomeStatement
+class IncomeStatement
 {
     private $id = 0;
 

Models/InvoicePosting.php

@@ -22,7 +22,7 @@ namespace Modules\Accounting\Models;
  * @link       http://website.orange-management.de
  * @since      1.0.0
  */
-final class InvoicePosting extends PostingAbstract
+class InvoicePosting extends PostingAbstract
 {
 
     /**