Resolved questions
What's the difference between 끝나다 and 끝내다?

general info about those types of verbs:

http://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-14-korean-passive-verbs/

http://www.koreanwikiproject.com/wiki/index.php?title=Passive_form

I tried to explain it with my own words, but then got confused with all those active/passive/causative endings, so better leave it to you ;)