Please point us to the exact (Java) files

We are actually using no year at all; some examples

UnifiedPush Server:
https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/server/src/test/resources/META-INF/persistence.xml

SimplePush Server:
https://github.com/aerogear/aerogear-simplepush-server/blob/master/datastores/redis/src/main/java/org/jboss/aerogear/simplepush/server/datastore/RedisDataStore.java

Android SDK:
https://github.com/aerogear/aerogear-android/blob/master/src/org/jboss/aerogear/android/datamanager/StoreFactory.java

iOS SDK:
https://github.com/aerogear/aerogear-ios/blob/master/AeroGear-iOS/security/AGAuthenticationModule.h

and so on

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