diff --git a/Models/NullCategory.php b/Models/NullCategory.php
index 429f13e..6f5af9f 100644
--- a/Models/NullCategory.php
+++ b/Models/NullCategory.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullCategory extends Category
+final class NullCategory extends Category
 {
 }
diff --git a/Models/NullCause.php b/Models/NullCause.php
index 561d6ce..ca1a5ff 100644
--- a/Models/NullCause.php
+++ b/Models/NullCause.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullCause extends Cause
+final class NullCause extends Cause
 {
 }
diff --git a/Models/NullDepartment.php b/Models/NullDepartment.php
index b35e126..8a64854 100644
--- a/Models/NullDepartment.php
+++ b/Models/NullDepartment.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullDepartment extends Department
+final class NullDepartment extends Department
 {
 }
diff --git a/Models/NullProcess.php b/Models/NullProcess.php
index b37f85d..4eefc2d 100644
--- a/Models/NullProcess.php
+++ b/Models/NullProcess.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullProcess extends Process
+final class NullProcess extends Process
 {
 }
diff --git a/Models/NullProject.php b/Models/NullProject.php
index ac8ab63..9be6ab4 100644
--- a/Models/NullProject.php
+++ b/Models/NullProject.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullProject extends Project
+final class NullProject extends Project
 {
 }
diff --git a/Models/NullRisk.php b/Models/NullRisk.php
index fad56ba..63ad605 100644
--- a/Models/NullRisk.php
+++ b/Models/NullRisk.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullRisk extends Risk
+final class NullRisk extends Risk
 {
 }
diff --git a/Models/NullRiskObject.php b/Models/NullRiskObject.php
index 412d8d2..44ed3a7 100644
--- a/Models/NullRiskObject.php
+++ b/Models/NullRiskObject.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullRiskObject extends RiskObject
+final class NullRiskObject extends RiskObject
 {
 }
diff --git a/Models/NullSolution.php b/Models/NullSolution.php
index dca303c..0f8b1b2 100644
--- a/Models/NullSolution.php
+++ b/Models/NullSolution.php
@@ -22,6 +22,6 @@ namespace Modules\RiskManagement\Models;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class NullSolution extends Solution
+final class NullSolution extends Solution
 {
 }