Maryland and New Jersey are both members of the Drivers License Compact which means NJ courts will report back to the MD Motor Vehicles Administration the ticket you received there. 

The newly updated MD Motor Vehicle Administration site notes that if you are convicted of a vehicle-related offense in a jurisdiction outside of Maryland, the MVA may assess points. The point values identified in Maryland law for similar offenses determine the number of points that you will be assessed.

The Maryland driver's manual currently states that once the MVA receives ticket information from another state they treat it as if the violation occurred in state. If that is the case, even if the offense is not one that they assign points to, it will be placed on your Maryland driving record.

To find out if points will be assigned to your driving record for the New Jersey ticket check directly with the MD MVA since it does not appear that all out of state violations will be assessed points. If points are put on your license they will be from the Maryland points list and not the NJ points system.