ReliabilityLayer doesn't need to expose a public WriteHandler interface.

briar-api/src/net/sf/briar/api/reliability/ReliabilityLayer.java

@@ -3,7 +3,7 @@ package net.sf.briar.api.reliability;
 import java.io.InputStream;
 import java.io.OutputStream;
 
-public interface ReliabilityLayer extends ReadHandler, WriteHandler {
+public interface ReliabilityLayer extends ReadHandler {
 
 	void start();
 

briar-core/src/net/sf/briar/reliability/ReliabilityLayerImpl.java

@@ -14,7 +14,7 @@ import java.util.logging.Logger;
 import net.sf.briar.api.reliability.ReliabilityLayer;
 import net.sf.briar.api.reliability.WriteHandler;
 
-class ReliabilityLayerImpl implements ReliabilityLayer {
+class ReliabilityLayerImpl implements ReliabilityLayer, WriteHandler {
 
 	private static final int TICK_INTERVAL = 500; // Milliseconds