I would like to resign from my current employment. Of course I will work my necessary two weeks notice. My problem is based on what I have observed with previous employees who have quit, the current company will be very interested to find out the reasons for my resignation, however I'm not inclined to tell them. Simple fact is, I don't like working there any more, and today, for reasons I'm not going into in the interests of preserving internet anonymity was the straw that broke the camel's back.
I can't tell them I'm moving jobs as they will expect to be asked for a reference, and I'm not moving jobs, just leaving. How to word this in my official letter of resignation, and how do I succinctly answer any questions without having to give away my feelings about why I'm really leaving, which would make working the notice period unnecessarily more unpleasant than it has to be?