It depends on how many packages of cigar were found in the depanneur. If the number was not big, the owner of the depanneur may get a bill of a few grands later on. Otherwise, it is serious. But I guess in a depanneur, the owner would not keep too many packages of cigar in store.
only alcol need permit here. No one can forbid you to sell cigarette and tabacco. For this case, wait for the fine, the amount depends on how much were found. It may take several years to know the result.