diff --git a/src/ATBAPP/ATBDeviceControllerPlugin.cpp b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
index 014cece..7e9e102 100644
--- a/src/ATBAPP/ATBDeviceControllerPlugin.cpp
+++ b/src/ATBAPP/ATBDeviceControllerPlugin.cpp
@@ -362,6 +362,7 @@ void ATBDeviceControllerPlugin::onVaultDoorOpened()
     // this is started here because we want to keep ptu awake in order to get
     // coin box removed / inserted etc.
     // BackgroundTask("ACCOUNT") is finished, if account message is sent to ISMAS!
+    this->dbus->startBackgroundTask("DOOR_OPEN");
 
     // do not: emit this->requestModeSERVICE();
 }
@@ -381,19 +382,31 @@ void ATBDeviceControllerPlugin::onCoinBoxInserted()
     qCritical() << "ATBDeviceControllerPlugin::onCoinBoxInserted()";
 }
 
+/**
+ * This is called, when all CoinBox is inserted and all doors
+ * are closed.
+ */
 void ATBDeviceControllerPlugin::onCBinAndAllDoorsClosed()
 {
     qCritical() << "ATBDeviceControllerPlugin::onCBinAndAllDoorsClosed()";
 
     QTimer::singleShot(2000, this, SIGNAL(requestModeIDLE()));
+
+    this->dbus->finishedBackgroundTask("DOOR_OPEN");
 }
 
-
+/**
+ *  This is called, when all no coinbox is inserted and all doors are
+ *  closed.
+ */
 void ATBDeviceControllerPlugin::onAllDoorsClosed()
 {
     qCritical() << "ATBDeviceControllerPlugin::onAllDoorsClosed()";
 
     emit this->requestModeIDLE();
+    this->dbus->finishedBackgroundTask("DOOR_OPEN");
+
+    // TODO: check for errors and create a machine event
 }
 
 void ATBDeviceControllerPlugin::onNewVoltage(uint32_t voltage)