diff --git a/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToExcelCustomer.cs b/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToExcelCustomer.cs
new file mode 100644
index 0000000..ad98b9c
--- /dev/null
+++ b/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToExcelCustomer.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CaseAccountingBusinessLogic.OfficePackage
+{
+    public class AbstractSaveToExcelCustomer
+    {
+    }
+}
diff --git a/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToPdfCustomer.cs b/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToPdfCustomer.cs
new file mode 100644
index 0000000..e5619ee
--- /dev/null
+++ b/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToPdfCustomer.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CaseAccountingBusinessLogic.OfficePackage
+{
+    public class AbstractSaveToPdfCustomer
+    {
+    }
+}
diff --git a/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToWordCustomer.cs b/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToWordCustomer.cs
new file mode 100644
index 0000000..f9bc408
--- /dev/null
+++ b/CaseAccounting/CaseAccountingBusinessLogics/OfficePackage/AbstractSaveToWordCustomer.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace CaseAccountingBusinessLogic.OfficePackage
+{
+    public class AbstractSaveToWordCustomer
+    {
+    }
+}