Most Hermans do hibernate. It is not a requirement for the good health of the animal. What this means is that if it is not inclined to hibernate I don't think it should be forced to do so. On the other hand if the animal shows signs of wanting to hibernate, you should provide the conditions to allow it to do so. Here are 2 websites that have more than enough information on the subject to give you an idea of what you are getting into.
I strongly suggest that you not lean towards hibernation until you research it thoroughly and the animal is a few years old. If you have a hatchling and keep it in a range of 70 to 90 through the year(cool spot to basking spot), the odds are it will not be triggered into hibernation.
http://www.tortoise.org/
http://tortoisetrust.org/
http://www.chelonia.org/
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Ed
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Trying to keep the fun in Chelonian care