Will my Droid 4 need a voltage converter overseas?

I will be traveling to Germany for 3 weeks in August. I am aware that I am going to need a adapter because they have rounded 2 prong outlets (unlike the flat prongs we have here in the US). However, German/European countries electrical outlets typically have an output of 220V-240V. Will this voltage destroy my phone if I do not get a voltage converter or will I be fine with just the adapter?