diff --git a/DbFirst.Contracts/Catalogs/CatalogReadDto.cs b/DbFirst.Contracts/Catalogs/CatalogReadDto.cs
new file mode 100644
index 0000000..6996e60
--- /dev/null
+++ b/DbFirst.Contracts/Catalogs/CatalogReadDto.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbFirst.Contracts.Catalogs
+{
+    internal class CatalogReadDto
+    {
+    }
+}
diff --git a/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs b/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs
new file mode 100644
index 0000000..8e74037
--- /dev/null
+++ b/DbFirst.Contracts/Catalogs/CatalogWriteDto.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbFirst.Contracts.Catalogs
+{
+    internal class CatalogWriteDto
+    {
+    }
+}
diff --git a/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs b/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs
new file mode 100644
index 0000000..d80581b
--- /dev/null
+++ b/DbFirst.Contracts/Dashboards/DashboardInfoDto.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbFirst.Contracts.Dashboards
+{
+    internal class DashboardInfoDto
+    {
+    }
+}
diff --git a/DbFirst.Contracts/Layouts/LayoutDto.cs b/DbFirst.Contracts/Layouts/LayoutDto.cs
new file mode 100644
index 0000000..597efe3
--- /dev/null
+++ b/DbFirst.Contracts/Layouts/LayoutDto.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbFirst.Contracts.Layouts
+{
+    internal class LayoutDto
+    {
+    }
+}
diff --git a/DbFirst.Contracts/Massdata/MassdataReadDto.cs b/DbFirst.Contracts/Massdata/MassdataReadDto.cs
new file mode 100644
index 0000000..01bb70c
--- /dev/null
+++ b/DbFirst.Contracts/Massdata/MassdataReadDto.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbFirst.Contracts.Massdata
+{
+    internal class MassdataReadDto
+    {
+    }
+}
diff --git a/DbFirst.Contracts/Massdata/MassdataWriteDto.cs b/DbFirst.Contracts/Massdata/MassdataWriteDto.cs
new file mode 100644
index 0000000..9587ff2
--- /dev/null
+++ b/DbFirst.Contracts/Massdata/MassdataWriteDto.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DbFirst.Contracts.Massdata
+{
+    internal class MassdataWriteDto
+    {
+    }
+}