Consider using a separate package for bramble-java (e.g. org.briarproject.bramble.java.*)

Currently, bramble-java provides the same packages as bramble-core. Some bramble-java classes extend package-private classes from bramble-core (mostly in bluetooth). Hmm ....

When briar is going to use java >= 9 and provides modules this needs to be addressed anyway. (I believe briar should be around for many, many new java versions to come ;-)