What is it you are looking for? Most of the same information is in ev3sources. I am not sure of the current status of ev3sources. It is available at mindboards / ev3sources, but you may need to generate the documentation from the Doxyfile. Do you have that?
As Bluetooth for the EV3 uses a standard Linux bluez stack, there is not much to say about that this time.
The Lego documentation describes their byte codes and communication protocol, but these are not used by leJOS.
Is there something specific you want to do with Bluetooth?