First off, I'm very glad that whatever caused this issue didn't get out of hand and destroy more of your property or harm you.
Secondly, the only way to know for sure is to talk to an Apple employee. Contact AppleCare by phone or make a Genius Bar appointment at your local Apple Store. If you choose to contact AppleCare by phone, make sure you have some pictures of the charger and phone's dock connector port, they may want you to email them so they can see what you are talking about.
The worst thing they can say to you is no, and it won't cost you anything to call or make a Genius Bar appointment, so why not try?
I hope this helps,