Revert "Revert "The variable 'ex' is declared but never used""

This reverts commit 043ffe8.

Author: Leon-Africa

src/APIM_ARMTemplate/apimtemplate/Common/FileHandlers/FileReader.cs

@@ -99,6 +99,7 @@ public bool isJSON(string fileContents)
             }
             catch (Exception ex)
             {
+                Console.WriteLine("Error occured: " + ex.Message);
                 return false;
             }
         }