diff --git a/Demo/Domain/UseCase/GroupUseCase.cs b/Demo/Domain/UseCase/GroupUseCase.cs
new file mode 100644
index 0000000..414853a
--- /dev/null
+++ b/Demo/Domain/UseCase/GroupUseCase.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo.Domain.UseCase
+{
+    internal class GroupUseCase
+    {
+    }
+}
diff --git a/Demo/UI/GroupConsole.cs b/Demo/UI/GroupConsole.cs
new file mode 100644
index 0000000..1ad9000
--- /dev/null
+++ b/Demo/UI/GroupConsole.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo.UI
+{
+    internal class GroupConsole
+    {
+    }
+}