diff --git a/li.strolch.agent/src/main/java/li/strolch/agent/api/AbstractModelObserver.java b/li.strolch.agent/src/main/java/li/strolch/agent/api/AbstractModelObserver.java
new file mode 100644
index 000000000..c279e57f7
--- /dev/null
+++ b/li.strolch.agent/src/main/java/li/strolch/agent/api/AbstractModelObserver.java
@@ -0,0 +1,25 @@
+package li.strolch.agent.api;
+
+import li.strolch.persistence.api.StrolchTransaction;
+import li.strolch.privilege.model.Certificate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class AbstractModelObserver {
+
+	protected static final Logger logger = LoggerFactory.getLogger(AbstractModelObserver.class);
+
+	private final ComponentContainer container;
+
+	public AbstractModelObserver(ComponentContainer container) {
+		this.container = container;
+	}
+
+	public ComponentContainer getContainer() {
+		return this.container;
+	}
+
+	protected StrolchTransaction openTx(Certificate cert) {
+		return this.container.getRealm(cert).openTx(cert, getClass(), false);
+	}
+}