Real Estate Law USA.com

My boyfriend is buying a home with a friend. He was just told yesterday that it is good to have a contract between him and his friend in case anything happens. Now I’m not sure which contract this is, but he asked me to look up "Joint Tenancy" but every time I do it’s about renters. He is actually going to be on the Deed, and he needs to write up a contract but doesn’t have a clue where to start. I need a sample contract or something to go by that I can add on to, of course any advice is greatly appreciated but I need something like a template to start with so I can include the names, etc. PLEASE HELP!!!! The house closes on the 10th and he wants to include it in the contract. YOUR HELP IS ALWAYS APPRECIATED.