This question already has an answer here:
Is the punctuation of generational suffixes (e.g. "Jr.", "Sr.") dropped when they occur at the end of a sentence?
I liked Gerald Rudolph Ford Jr.
The obvious answer seems to be yes, since having two periods back-to-back seems incorrect. If that is the case, however, it seems strange because there appears to be "information loss" in that the shortening of the generation suffix and the end of the sentence both share the same punctuation.