Lynn Pier Parking Garage seemed a little empty to me in vanilla Fallout.
To get back into modding, I decided to put together a short unmarked quest using the Lynn Pier Parking Garage location.
I've added a terminal, a few containers, a (hopefully) interesting backstory, and a cool reward for completing the quest.
It should not take more than five minutes to complete.
This is a very short unmarked quest that I threw together.
All you need is up-to-date vanilla Fallout 4. No DLC necessary. Feel free to let me know if there are any problems!

Just drop the plugin into Fallout 4/Data folder or use NMM to install.