Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Kernels/AssemblyToolKernelWrapperFactory.cs
===================================================================
diff -u -rbc85d5aa0b1c0eefd837eb1f12b392305ab7a45e -r2edcd7944ce0d87b3299baa2887ab67a3cfe15e3
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Kernels/AssemblyToolKernelWrapperFactory.cs	(.../AssemblyToolKernelWrapperFactory.cs)	(revision bc85d5aa0b1c0eefd837eb1f12b392305ab7a45e)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.KernelWrapper/Kernels/AssemblyToolKernelWrapperFactory.cs	(.../AssemblyToolKernelWrapperFactory.cs)	(revision 2edcd7944ce0d87b3299baa2887ab67a3cfe15e3)
@@ -37,7 +37,7 @@
         {
             get
             {
-                return instance ?? new AssemblyToolKernelWrapperFactory();
+                return instance ?? (instance = new AssemblyToolKernelWrapperFactory());
             }
             set
             {
@@ -47,7 +47,7 @@
 
         public IAssemblyCategoryBoundariesKernel CreateAssemblyCategoryBoundariesKernel()
         {
-            throw new NotImplementedException();
+            return new AssemblyCategoryBoundariesKernelWrapper();
         }
     }
 }
\ No newline at end of file