diff --git a/CarCenter/CarCenterDatabaseImplement/Models/Order.cs b/CarCenter/CarCenterDatabaseImplement/Models/Order.cs
index c4881c6..c50160a 100644
--- a/CarCenter/CarCenterDatabaseImplement/Models/Order.cs
+++ b/CarCenter/CarCenterDatabaseImplement/Models/Order.cs
@@ -1,6 +1,7 @@
 using CarCenterContracts.BindingModels;
 using CarCenterContracts.ViewModels;
 using CarCenterDataModels.Enums;
+using CarCenterDataModels.Models;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
@@ -10,7 +11,7 @@ using System.Threading.Tasks;
 
 namespace CarCenterDatabaseImplement.Models
 {
-	public class Order
+	public class Order : IOrderModel
 	{
 		public int Id { get; set; }
 		public int WorkerId { get; set; }
diff --git a/CarCenter/CarCenterDatabaseImplement/Models/Presale.cs b/CarCenter/CarCenterDatabaseImplement/Models/Presale.cs
index 881e8d1..88be5bc 100644
--- a/CarCenter/CarCenterDatabaseImplement/Models/Presale.cs
+++ b/CarCenter/CarCenterDatabaseImplement/Models/Presale.cs
@@ -1,6 +1,7 @@
 using CarCenterContracts.BindingModels;
 using CarCenterContracts.ViewModels;
 using CarCenterDataModels.Enums;
+using CarCenterDataModels.Models;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
@@ -10,7 +11,7 @@ using System.Threading.Tasks;
 
 namespace CarCenterDatabaseImplement.Models
 {
-	public class Presale
+	public class Presale : IPresaleModel
 	{
 		public int Id { get; set; }
 		[Required]
diff --git a/CarCenter/CarCenterDatabaseImplement/Models/Worker.cs b/CarCenter/CarCenterDatabaseImplement/Models/Worker.cs
index 131759b..32a9145 100644
--- a/CarCenter/CarCenterDatabaseImplement/Models/Worker.cs
+++ b/CarCenter/CarCenterDatabaseImplement/Models/Worker.cs
@@ -1,6 +1,7 @@
 using CarCenterContracts.BindingModels;
 using CarCenterContracts.ViewModels;
 using CarCenterDataModels.Enums;
+using CarCenterDataModels.Models;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
@@ -11,7 +12,7 @@ using System.Threading.Tasks;
 
 namespace CarCenterDatabaseImplement.Models
 {
-	public class Worker
+	public class Worker : IWorkerModel
 	{
 		public int Id { get; set; }
 		[Required]