Add calculators saving

StructureHelperLogics/NdmCalculations/Primitives/IEllipseNdmPrimitive.cs

@@ -0,0 +1,15 @@
+using StructureHelperCommon.Models.Shapes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    public interface IEllipseNdmPrimitive : INdmPrimitive, IHasDivisionSize, IRectangleShape
+    {
+
+
+    }
+}