fixes #346

lib/Doctrine/Node/AdjacencyList.php

@@ -29,6 +29,6 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Node_AdjacencyList extends Doctrine_Node implements Doctrine_Node_Interface
+abstract class Doctrine_Node_AdjacencyList extends Doctrine_Node implements Doctrine_Node_Interface
 {}
 

lib/Doctrine/Node/AdjacencyList/LevelOrderIterator.php

@@ -29,5 +29,5 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Node_AdjacencyList_LevelOrderIterator implements Iterator
+abstract class Doctrine_Node_AdjacencyList_LevelOrderIterator implements Iterator
 {}

lib/Doctrine/Node/AdjacencyList/PostOrderIterator.php

@@ -29,5 +29,5 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Node_AdjacencyList_PostOrderIterator implements Iterator
+abstract class Doctrine_Node_AdjacencyList_PostOrderIterator implements Iterator
 {}

lib/Doctrine/Node/AdjacencyList/PreOrderIterator.php

@@ -29,5 +29,5 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Node_AdjacencyList_PreOrderIterator implements Iterator
+abstract class Doctrine_Node_AdjacencyList_PreOrderIterator implements Iterator
 {}

lib/Doctrine/Node/MaterializedPath.php

@@ -29,6 +29,6 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Node_MaterializedPath extends Doctrine_Node implements Doctrine_Node_Interface
+abstract class Doctrine_Node_MaterializedPath extends Doctrine_Node implements Doctrine_Node_Interface
 {}
 

lib/Doctrine/Tree/AdjacencyList.php

@@ -29,5 +29,5 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Tree_AdjacencyList extends Doctrine_Tree implements Doctrine_Tree_Interface
+abstract class Doctrine_Tree_AdjacencyList extends Doctrine_Tree implements Doctrine_Tree_Interface
 {}

lib/Doctrine/Tree/MaterializedPath.php

@@ -29,5 +29,5 @@
  * @version     $Revision$
  * @author      Joe Simms <joe.simms@websites4.com>
  */
-class Doctrine_Tree_MaterializedPath extends Doctrine_Tree implements Doctrine_Tree_Interface
+abstract class Doctrine_Tree_MaterializedPath extends Doctrine_Tree implements Doctrine_Tree_Interface
 {}