Voila :
Exception in thread "main" java.lang.NullPointerException
at fr.scarex.onf.ObfuscatedNameFinder.findForgeVersions(ObfuscatedNameFinder.java:66)
at fr.scarex.onf.ObfuscatedNameFinder.<init>(ObfuscatedNameFinder.java:54)
at fr.scarex.onf.ObfuscatedNameFinder.main(ObfuscatedNameFinder.java:46)
NPE !!!