diff --git a/BlogDataModels/BlogDataModels/ICategoryModel.cs b/BlogDataModels/BlogDataModels/ICategoryModel.cs
new file mode 100644
index 0000000..64a9363
--- /dev/null
+++ b/BlogDataModels/BlogDataModels/ICategoryModel.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ForumDataModels
+{
+    public interface ICategoryModel : IId
+    {
+        string Name { get; }
+    }
+}
diff --git a/BlogDataModels/BlogDataModels/IId.cs b/BlogDataModels/BlogDataModels/IId.cs
new file mode 100644
index 0000000..34c0a00
--- /dev/null
+++ b/BlogDataModels/BlogDataModels/IId.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ForumDataModels
+{
+    public interface IId
+    {
+        int Id { get; }
+    }
+}
diff --git a/BlogDataModels/BlogDataModels/IMessageModel.cs b/BlogDataModels/BlogDataModels/IMessageModel.cs
new file mode 100644
index 0000000..5c4046e
--- /dev/null
+++ b/BlogDataModels/BlogDataModels/IMessageModel.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ForumDataModels
+{
+    public interface IMessageModel : IId
+    {
+        string Text { get; }
+        DateTime Date { get; }
+    }
+}
diff --git a/BlogDataModels/BlogDataModels/IRoleModel.cs b/BlogDataModels/BlogDataModels/IRoleModel.cs
new file mode 100644
index 0000000..43ea585
--- /dev/null
+++ b/BlogDataModels/BlogDataModels/IRoleModel.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ForumDataModels
+{
+    public interface IRoleModel : IId
+    {
+        string Name { get; }
+    }
+}
diff --git a/BlogDataModels/BlogDataModels/ITopicModel.cs b/BlogDataModels/BlogDataModels/ITopicModel.cs
new file mode 100644
index 0000000..4f8f2a2
--- /dev/null
+++ b/BlogDataModels/BlogDataModels/ITopicModel.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ForumDataModels
+{
+    public interface ITopicModel : IId
+    {
+        string Name { get; }
+
+        int CategoryId { get; }
+    }
+}
diff --git a/BlogDataModels/BlogDataModels/IUserModel.cs b/BlogDataModels/BlogDataModels/IUserModel.cs
new file mode 100644
index 0000000..063e21b
--- /dev/null
+++ b/BlogDataModels/BlogDataModels/IUserModel.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ForumDataModels
+{
+    public interface IUserModel : IId
+    {
+        string Username { get; }
+        string Email { get; }
+        string Password { get; }
+        DateTime RegistrationDate { get; }
+        int RoleId { get; }
+    }
+}
diff --git a/BlogDataModels/BlogViewModel/Program.cs b/BlogDataModels/BlogViewModel/Program.cs
index 3361c95..7a0530d 100644
--- a/BlogDataModels/BlogViewModel/Program.cs
+++ b/BlogDataModels/BlogViewModel/Program.cs
@@ -1,4 +1,4 @@
-
+using BlogContracts
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using NLog.Extensions.Logging;