diff --git a/Doctrine/DB/EventListener.php b/Doctrine/DB/EventListener.php
new file mode 100644
index 000000000..d91970b14
--- /dev/null
+++ b/Doctrine/DB/EventListener.php
@@ -0,0 +1,46 @@
+<?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_DB_EventListener
+ *
+ * @author      Konsta Vesterinen
+ * @license     LGPL
+ * @package     Doctrine
+ */
+class Doctrine_DB_EventListener implements Doctrine_DB_EventListener_Interface {
+    public function onPreQuery(Doctrine_DB $dbh, array $args) { }
+    public function onQuery(Doctrine_DB $dbh, array $args) { }
+
+    public function onPrePrepare(Doctrine_DB $dbh, array $args) { }
+    public function onPrepare(Doctrine_DB $dbh, array $args) { }
+
+    public function onPreCommit(Doctrine_DB $dbh) { }
+    public function onCommit(Doctrine_DB $dbh) { }
+
+    public function onPreRollBack(Doctrine_DB $dbh) { }
+    public function onRollBack(Doctrine_DB $dbh) { }
+
+    public function onPreBeginTransaction(Doctrine_DB $dbh) { }
+    public function onBeginTransaction(Doctrine_DB $dbh) { }
+
+    public function onPreExecute(Doctrine_DB_Statement $stmt, array $params) { }
+    public function onExecute(Doctrine_DB_Statement $stmt, array $params) { }
+}
diff --git a/Doctrine/DB/EventListener/Chain.php b/Doctrine/DB/EventListener/Chain.php
new file mode 100644
index 000000000..9b7a8192a
--- /dev/null
+++ b/Doctrine/DB/EventListener/Chain.php
@@ -0,0 +1,97 @@
+<?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_DB_EventListener
+ *
+ * @author      Konsta Vesterinen
+ * @license     LGPL
+ * @package     Doctrine
+ */
+class Doctrine_DB_EventListener_Chain implements Doctrine_DB_EventListener_Interface {
+    private $listeners = array();
+
+
+    public function onPreQuery(Doctrine_DB $dbh, array $args) {
+        foreach($this->listeners as $listener) {
+            $listener->onPreQuery($dbh, $args);
+        }
+    }
+    public function onQuery(Doctrine_DB $dbh, array $args) { 
+        foreach($this->listeners as $listener) {
+            $listener->onPreQuery($dbh, $args);
+        }
+    }
+
+    public function onPrePrepare(Doctrine_DB $dbh, array $args) { 
+        foreach($this->listeners as $listener) {
+            $listener->onPrePrepare($dbh, $args);
+        }
+    }
+    public function onPrepare(Doctrine_DB $dbh, array $args) { 
+        foreach($this->listeners as $listener) {
+            $listener->onPrepare($dbh, $args);
+        }
+    }
+
+    public function onPreCommit(Doctrine_DB $dbh) { 
+        foreach($this->listeners as $listener) {
+            $listener->onPreCommit($dbh);
+        }
+    }
+    public function onCommit(Doctrine_DB $dbh) { 
+        foreach($this->listeners as $listener) {
+            $listener->onCommit($dbh);
+        }
+    }
+
+    public function onPreRollBack(Doctrine_DB $dbh) {
+        foreach($this->listeners as $listener) {
+            $listener->onPreRollBack($dbh);
+        }
+    }
+    public function onRollBack(Doctrine_DB $dbh) { 
+        foreach($this->listeners as $listener) {
+            $listener->onRollBack($dbh);
+        }
+    }
+
+    public function onPreBeginTransaction(Doctrine_DB $dbh) { 
+        foreach($this->listeners as $listener) {
+            $listener->onPreBeginTransaction($dbh);
+        }
+    }
+    public function onBeginTransaction(Doctrine_DB $dbh) { 
+        foreach($this->listeners as $listener) {
+            $listener->onBeginTransaction($dbh);
+        }
+    }
+
+    public function onPreExecute(Doctrine_DB_Statement $stmt, array $params) { 
+        foreach($this->listeners as $listener) {
+            $listener->onPreExecute($stmt, $params);
+        }
+    }
+    public function onExecute(Doctrine_DB_Statement $stmt, array $params) {
+        foreach($this->listeners as $listener) {
+            $listener->onExecute($stmt, $params);
+        }
+    }
+}
diff --git a/Doctrine/DB/EventListener/Interface.php b/Doctrine/DB/EventListener/Interface.php
new file mode 100644
index 000000000..709162a25
--- /dev/null
+++ b/Doctrine/DB/EventListener/Interface.php
@@ -0,0 +1,46 @@
+<?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_DB_EventListener
+ *
+ * @author      Konsta Vesterinen
+ * @license     LGPL
+ * @package     Doctrine
+ */
+interface Doctrine_DB_EventListener {     
+    public function onPreQuery(Doctrine_DB $dbh, array $args);
+    public function onQuery(Doctrine_DB $dbh, array $args);
+
+    public function onPrePrepare(Doctrine_DB $dbh, array $args);
+    public function onPrepare(Doctrine_DB $dbh, array $args);
+
+    public function onPreCommit(Doctrine_DB $dbh);
+    public function onCommit(Doctrine_DB $dbh);
+
+    public function onPreRollBack(Doctrine_DB $dbh);
+    public function onRollBack(Doctrine_DB $dbh);
+
+    public function onPreBeginTransaction(Doctrine_DB $dbh);
+    public function onBeginTransaction(Doctrine_DB $dbh);
+
+    public function onPreExecute(Doctrine_DB_Statement $stmt, array $params);
+    public function onExecute(Doctrine_DB_Statement $stmt, array $params);
+}
diff --git a/Doctrine/DB/Exception.php b/Doctrine/DB/Exception.php
index e4d4d7eba..ef4004edd 100644
--- a/Doctrine/DB/Exception.php
+++ b/Doctrine/DB/Exception.php
@@ -1,2 +1,28 @@
 <?php
+/*
+ *  $Id$
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.phpdoctrine.com>.
+ */
+/**
+ * Doctrine_DB_Exception
+ *
+ * @author      Konsta Vesterinen
+ * @license     LGPL
+ * @package     Doctrine
+ */
 class Doctrine_DB_Exception extends Doctrine_Exception { }