I'm adding this as a FYI if anyone is trying to run the downloaded file on opensuse, though it may apply to other linux distributions. I had to run the following to get the program to run
java com.dmr.DMRDecode
If you get the source from github, it won't compile, or at least not on my system. The source code has illegal characters, namely some fancy way to put 1/2 and 3/4 into one character. Maybe that is a windows thing. When you get the errors list, the lines will be obvious. Some of the errors are in comments. Yes, apparently you can get an error in a comment line if the character is considered illegal. The other locations where the character is used is in output. Change as you feel appropriate.
The only contact I can find for the author is twitter, which I don't use. I will follow this thread, and if it looks appropriate (like I really found some bugs and my fix is valid), I will try to report the bug on github.