diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index 8d0c6a1..44e6665 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -9,12 +9,13 @@ module org.xbib.event {
     exports org.xbib.event.io;
     exports org.xbib.event.loop;
     exports org.xbib.event.loop.selector;
+    exports org.xbib.event.util;
     requires org.xbib.datastructures.api;
     requires org.xbib.datastructures.common;
     requires org.xbib.datastructures.json.tiny;
-    requires transitive org.xbib.settings.api;
+    requires org.xbib.settings.api;
     requires org.xbib.time;
     requires org.xbib.net;
-    requires transitive org.reactivestreams;
+    requires org.reactivestreams;
     requires java.logging;
 }
diff --git a/src/main/java/org/xbib/event/clock/ClockEventManager.java b/src/main/java/org/xbib/event/clock/ClockEventManager.java
index 301ab5b..6a35539 100644
--- a/src/main/java/org/xbib/event/clock/ClockEventManager.java
+++ b/src/main/java/org/xbib/event/clock/ClockEventManager.java
@@ -1,5 +1,6 @@
 package org.xbib.event.clock;
 
+import org.xbib.event.bus.AsyncEventBus;
 import org.xbib.event.bus.EventBus;
 import org.xbib.settings.Settings;
 import org.xbib.time.schedule.CronExpression;
@@ -19,6 +20,10 @@ public class ClockEventManager implements Closeable {
 
     private final CronSchedule<Integer> cronSchedule;
 
+    public ClockEventManager(Settings settings) {
+        this(settings, new AsyncEventBus(Executors.newSingleThreadExecutor()), ClockEventManager.class.getClassLoader());
+    }
+
     public ClockEventManager(Settings settings,
                              EventBus eventBus,
                              ClassLoader classLoader) {
diff --git a/src/main/java/org/xbib/event/timer/TimerEventManager.java b/src/main/java/org/xbib/event/timer/TimerEventManager.java
index e0e6a1e..0deb0dc 100644
--- a/src/main/java/org/xbib/event/timer/TimerEventManager.java
+++ b/src/main/java/org/xbib/event/timer/TimerEventManager.java
@@ -1,5 +1,6 @@
 package org.xbib.event.timer;
 
+import org.xbib.event.bus.AsyncEventBus;
 import org.xbib.event.bus.EventBus;
 import org.xbib.event.persistence.FilePersistenceStore;
 import org.xbib.event.persistence.PersistenceStore;
@@ -15,6 +16,7 @@ import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.util.LinkedHashMap;
 import java.util.Map;
+import java.util.concurrent.Executors;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -24,6 +26,11 @@ public class TimerEventManager implements Closeable {
 
     private final Map<String, TimerEventService> services;
 
+    public TimerEventManager(Settings settings) {
+        this(settings, new AsyncEventBus(Executors.newSingleThreadExecutor()),
+                TimerEventManager.class.getClassLoader(), ZoneId.systemDefault());
+    }
+
     @SuppressWarnings("unchecked")
     public TimerEventManager(Settings settings,
                              EventBus eventBus,