Java 5 cleanups

router/java/src/net/i2p/router/Blocklist.java

router/java/src/net/i2p/router/CommSystemFacade.java

...va/src/net/i2p/router/transport/CommSystemFacadeImpl.java

...va/src/net/i2p/router/transport/FIFOBandwidthLimiter.java

...a/src/net/i2p/router/transport/FIFOBandwidthRefiller.java

...r/java/src/net/i2p/router/transport/TransportManager.java