I am still nervous about this, please help me

I am, otherwise, completely eligible for the $8000 first-time homebuyer tax credit. However, the house that I am going to purchase was occupied by tenants. The tenants signed a contract with the seller on May 2009. The contract says that the tenants will rent the house from May 2009 to May 31, 2010.

The problem is:
If I buy the house and close it on Mach 31, 2010. I will become a landlord and the tenants will not move out until the end of May and will pay the rent to me for two months (April and May). In other words, the house will be a renting property for two month under my name. Does it jeopardize the $8000 tax credit that I am otherwise qualified for it?

Thank you very much,
Poplar