add Closeable/Flushable interfaces

...ressbook/java/src/net/i2p/addressbook/ConfigIterator.java

apps/i2psnark/java/src/org/klomp/snark/Storage.java

apps/sam/java/src/net/i2p/sam/SAMMessageSession.java

...g/java/src/net/i2p/client/streaming/impl/PacketQueue.java

...ng/java/src/net/i2p/client/streaming/impl/PcapWriter.java

core/java/src/net/i2p/internal/I2CPMessageQueue.java

core/java/src/net/i2p/util/LogManager.java

core/java/src/net/metanotion/io/RandomAccessInterface.java

core/java/src/net/metanotion/io/block/BlockFile.java

core/java/src/net/metanotion/io/block/index/BSkipList.java

core/java/src/net/metanotion/util/skiplist/SkipLevels.java

core/java/src/net/metanotion/util/skiplist/SkipList.java

core/java/src/net/metanotion/util/skiplist/SkipSpan.java

...et/i2p/router/networkdb/kademlia/PersistentDataStore.java

...ava/src/net/i2p/router/transport/ntcp/NTCPConnection.java