Do ferrite beads need snubbing diodes?
Since there is some inductance in ferrite beads, should they too have
  a snubber, or is their internal resistance adequate to discharge
  current after an opened load?


Short answer, No. Why? because ferrite is a magnetic material with a saturation point (whereas coils with air do not saturate magnetically). Ferrite material also has more magnetic resistance and is lossy. So you will store less energy. The internal resistance will help dampen out sharp rises associated with "instantaneous" changes in current.  

There will however, be some ringing at high frequencies (as shown in figure B below) when used with a capacitor in a filter, and there are better ways to compensate the circuit (Method C) to avoid overshoot.


Source: http://www.analog.com/en/analog-dialogue/articles/ferrite-beads-demystified.html