diff --git a/ServiceStation/ServiceStationDataModels/IId.cs b/ServiceStation/ServiceStationDataModels/IId.cs
new file mode 100644
index 0000000..c8a3e64
--- /dev/null
+++ b/ServiceStation/ServiceStationDataModels/IId.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ServiceStationDataModels
+{
+    public interface IId
+    {
+        int Id { get; }
+    }
+}
diff --git a/ServiceStation/ServiceStationDataModels/ServiceStationDataModels.csproj b/ServiceStation/ServiceStationDataModels/ServiceStationDataModels.csproj
index 132c02c..7264f69 100644
--- a/ServiceStation/ServiceStationDataModels/ServiceStationDataModels.csproj
+++ b/ServiceStation/ServiceStationDataModels/ServiceStationDataModels.csproj
@@ -6,4 +6,9 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Folder Include="Enums\" />
+    <Folder Include="Models\" />
+  </ItemGroup>
+
 </Project>