CrackWidthCalculator has been added

StructureHelperLogics/NdmCalculations/Cracking/CrackWidthCalculator.cs

@@ -0,0 +1,26 @@
+using StructureHelperCommon.Models.Calculators;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Cracking
+{
+    public class CrackWidthCalculator : ICalculator
+    {
+        CrackWidthCalculatorResult result;
+        public string Name { get; set; }
+        public ICrackWidthCalculatorInputData InputData { get; set; }
+        public IResult Result => result;
+
+        public void Run()
+        {
+            throw new NotImplementedException();
+        }
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}