--- JDBC4MysqlPooledConnection.java	2011-09-19 10:40:20.000000000 +0200
+++ JDBC4MysqlPooledConnection.java	2011-09-19 10:45:56.000000000 +0200
@@ -75,8 +74,8 @@
 	 * <p>
 	 * @since 1.6
 	 */
-	public void addStatementEventListener(StatementEventListener listener) {
-		synchronized (this.statementEventListeners) {
+	public synchronized void addStatementEventListener(StatementEventListener listener) {
+		if (this.statementEventListeners != null) {
 			this.statementEventListeners.put(listener, listener);
 		}
 	}
@@ -92,14 +91,14 @@
 	 * <p>
 	 * @since 1.6
 	 */
-	public void removeStatementEventListener(StatementEventListener listener) {
-		synchronized (this.statementEventListeners) {
+	public synchronized void removeStatementEventListener(StatementEventListener listener) {
+		if (this.statementEventListeners != null) {
 			this.statementEventListeners.remove(listener);
 		}
 	}
 	
-	void fireStatementEvent(StatementEvent event) throws SQLException {
-		synchronized (this.statementEventListeners) {
+	synchronized void fireStatementEvent(StatementEvent event) throws SQLException {
+		if (this.statementEventListeners != null) {
 			for (StatementEventListener listener : this.statementEventListeners.keySet()) {
 				listener.statementClosed(event);
 			}