I have the following formatting:
https://github.com/graphhopper/graphhopper/blob/master/pom.xml#L29

Now I have this "within constructor code":

    public FinishInstruction( final double lat, final double lon )
    {
        super(FINISH, "", DISTANCES, TIMES, new PointList()
        {   
            {
                add(lat, lon);
            }
        });
    }

When I format this source it adds a blank line:

    public FinishInstruction( final double lat, final double lon )
    {
        super(FINISH, "", DISTANCES, TIMES, new PointList()
        {
            
            {
                add(lat, lon);
            }
        });
    }

Looks similar to https://netbeans.org/bugzilla/show_bug.cgi?id=7732