The burrow update does suggest to me a badger rather than a wolverine. While wolverines do dig burrows, they tend to do so into snowdrifts rather than earth. Once they have bred and the snow has melted wolverines revert to sleeping above ground, hiding under bushes or fallen trees. Badgers on the other hand, use complex burrow systems all year round.
Also, while I have never seen or heard of a wolverine enclosure with underground viewing with badgers it is almost a requirement, as in this German mustelid park: