3 files changed, 13 insertions, 2 deletions
diff --git a/beautifulsoup/builder/__init__.py b/beautifulsoup/builder/__init__.py
index 9ffa9ef..d6c750c 100644
--- a/beautifulsoup/builder/__init__.py
+++ b/beautifulsoup/builder/__init__.py
@@ -7,7 +7,6 @@ __all__ = [
     'TreeBuilder',
     ]
 
-
 class TreeBuilder(Entities):
     """Turn a document into a Beautiful Soup object tree."""
 
@@ -163,3 +162,6 @@ class HTMLTreeBuilder(TreeBuilder):
                         raise StopParsing
                     pass
         return False
+
+from _lxml import *
+from _html5lib import *
diff --git a/beautifulsoup/builder/html5lib_builder.py b/beautifulsoup/builder/_html5lib.py
index 0a24ce1..9cca0b0 100644
--- a/beautifulsoup/builder/html5lib_builder.py
+++ b/beautifulsoup/builder/_html5lib.py
@@ -1,3 +1,7 @@
+__all__ = [
+    'HTML5TreeBuilder',
+    ]
+
 from beautifulsoup.builder import HTMLTreeBuilder, SAXTreeBuilder
 import html5lib
 from html5lib.constants import DataLossWarning
@@ -217,6 +221,6 @@ class TextNode(Element):
         html5lib.treebuilders._base.Node.__init__(self, None)
         self.element = element
         self.soup = soup
-    
+
     def cloneNode(self):
         raise NotImplementedError
diff --git a/beautifulsoup/builder/lxml_builder.py b/beautifulsoup/builder/_lxml.py
index 9f4c0bd..c2f368c 100644
--- a/beautifulsoup/builder/lxml_builder.py
+++ b/beautifulsoup/builder/_lxml.py
@@ -1,3 +1,8 @@
+__all__ = [
+    'LXMLTreeBuilderForXML',
+    'LXMLTreeBuilder',
+    ]
+
 from lxml import etree
 from beautifulsoup.element import Comment, Doctype
 from beautifulsoup.builder import TreeBuilder, HTMLTreeBuilder