You may find that you are lucky and the two halves will still fit neatly back together. If not then odd bits of wood the abstruct the join fitting neatly can be removed first. Rough splitting is not a proble in itself and does actually strengthen the join as it gives a greater surface area. Epoxy glue is very forgiving, especially when used with a gap filling additive. Most important though is to make sure it is atraight when glued, any bend on gluing will be permanent.