diff --git a/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/NotificationManagementService.h b/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/NotificationManagementService.h
index 401f2a8..7dde4f2 100644
--- a/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/NotificationManagementService.h
+++ b/Trenser.VehicleServiceSystem/Trenser.VehicleServiceSystem/services/NotificationManagementService.h
@@ -6,7 +6,8 @@
 class NotificationManagementService : public Subject
 {
 public:
-	virtual void sendNotification(User* recipient, const std::string& title, const std::string& message) = 0;
-	virtual void attach(User* user) = 0;
-	virtual void detach(User* user) = 0;
+	void sendNotification(User* recipient, const std::string& title, const std::string& message);
+	void attach(User* user) override;
+	void detach(User* user) override;
+	void notify(Notification* notification) override;
 };