Small fixes in TSpace
Small fixes in TSpace

 * add annotation @Override
 * add empty lines between methods
 * make expirables final

alcarraz/jPOS,alcarraz/jPOS,barspi/jPOS,barspi/jPOS,jpos/jPOS,alcarraz/jPOS,barspi/jPOS,jpos/jPOS,jpos/jPOS