code: @Trivial
      private String addSlash(String input){
          if(input.endsWith("/") || input.endsWith("\\"))
              return "";
          return File.separator;
      }
docs: Returns a File.pathSeparator if the input String does not end in / or \\
  @param input - The String to test
  @return A String containing a File.pathSeparator if the input String doesn't end in / or \\