Strike or Interference?

[Scooby]

I had this play yesterday in a NAIA game.

R1 on first no outs. R1 steals on the pitch and after the ball is in the catchers glove, B2 swings. No attempt at the ball just wanted to get in the way, but also there was no interference. I made the call no strike since there was no attempt at the ball and no interference. Needless to say the defensive coach was not happy. I explained that if I ruled it a strike and there was contact (bat on the glove) then I would have to have been obstruction since it would be a legitimate swing. So I was leaving the opptunity open to call interference.

What would you have had?

I think that I should have called it a strike and if there was contact then no strike and interference.