I can't get my model to work in mc creator

I'm trying to import a model for a chest kind of block I made (with animations) but when I import the .java file it doesn't let me select it as an option for the block.

I don't know if this is the correct way to go about this and honestly I've looked up tutorial after tutorial to no avail. Is there a way I can do this? I have .json files for the animations but I don't know how to go about importing them with the model into mc creator. I've added the model to see if there's maybe anything that needs to be changed for any reason?