title: n-Tier Application and Helper Classes
body: <p>I am learning the n-tier application architecture and writing simple imitation of Console CMS on Java. Let's say I've already modeled my DAL and BLL layers. However, it's a console application with command-line so I have class that parse user's input. Let's suppose it to be 'helper'. Where in this 3-tier it should be located? </p>