Separated event infrastructure from DB.

briar-core/src/org/briarproject/event/EventBusImpl.java

@@ -0,0 +1,26 @@
+package org.briarproject.event;
+
+import java.util.Collection;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import org.briarproject.api.event.Event;
+import org.briarproject.api.event.EventBus;
+import org.briarproject.api.event.EventListener;
+
+class EventBusImpl implements EventBus {
+
+	private final Collection<EventListener> listeners =
+			new CopyOnWriteArrayList<EventListener>();
+
+	public void addListener(EventListener l) {
+		listeners.add(l);
+	}
+
+	public void removeListener(EventListener l) {
+		listeners.remove(l);
+	}
+
+	public void broadcast(Event e) {
+		for(EventListener l : listeners) l.eventOccurred(e);
+	}
+}

briar-core/src/org/briarproject/event/EventModule.java

@@ -0,0 +1,14 @@
+package org.briarproject.event;
+
+import org.briarproject.api.event.EventBus;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.Singleton;
+
+public class EventModule extends AbstractModule {
+
+	@Override
+	protected void configure() {
+		bind(EventBus.class).to(EventBusImpl.class).in(Singleton.class);
+	}
+}