While tied off to a linear dock a large vessel (70 ft), with its dinghy mounted on the swim platform, backed in to our bow while departing. It stuck in reverse. We were having our morning coffee in the stern berth. To us and other boaters in the marina it was a significant impact. I investigated and could find nothing obvious other than a broken anchor roller. I have been monitoring the bilge and the fresh water tank. I am seeking some guidance on what further steps should I take to ensure there was no damage to the hull?