Add virtual GetSource with no params to abstract pricelist tool

src/PriceListTools/AbstractPriceListTool.cs

@@ -39,6 +39,11 @@ namespace RehauSku.PriceListTools
             }
         }
 
+        public virtual void GetSource()
+        {
+            throw new NotImplementedException();
+        }
+
         public virtual void GetSource(string[] files)
         {
             ExcelApp.ScreenUpdating = false;

src/PriceListTools/ExportTool.cs

@@ -17,10 +17,11 @@ namespace RehauSku.PriceListTools
             Selection = ExcelApp.Selection;
         }
 
-        public override void GetSource(string[] files)
+        public override void GetSource()
         {
             if (Selection != null && Selection.Columns.Count == 2)
                 FillSkuAmountDict();
+
             else throw new Exception("Неверный диапазон");
         }
 

src/Ribbon/RibbonController.cs

@@ -65,7 +65,7 @@ namespace RehauSku.Ribbon
             {
                 using (ExportTool exportTool = new ExportTool())
                 {
-                    exportTool.GetSource(null);
+                    exportTool.GetSource();
                     string exportFile = PriceList.CreateNewFile();
                     exportTool.OpenNewPrice(exportFile);
                     exportTool.FillPriceList();