diff --git a/ldapcherry/backend/backendLdap.py b/ldapcherry/backend/backendLdap.py
new file mode 100644
index 0000000..54bf5be
--- /dev/null
+++ b/ldapcherry/backend/backendLdap.py
@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+# vim:set expandtab tabstop=4 shiftwidth=4:
+#
+# The MIT License (MIT)
+# LdapCherry
+# Copyright (c) 2014 Carpentier Pierre-Francois
+
+import cherrypy
+import ldap
+import logging
+import ldapcherry.backend
+
+class Backend(ldapcherry.backend.Backend):
+
+    def __init__(self, config, logger):
+        self.config = config
+        self._logger = logger
+
+    def auth(self, username, password):
+
+        binddn = get_user(username)
+        if binddn:
+            ldap_client = self._connect()
+            try:
+                ldap_client.simple_bind_s(binddn, password)
+            except ldap.INVALID_CREDENTIALS:
+                ldap_client.unbind_s()
+                return False
+            ldap_client.unbind_s()
+            return True
+        else:
+            return False
+
+    def add_to_group(self):
+        pass
+
+    def set_attrs(self, attrs):
+        pass
+
+    def rm_from_group(self):
+        pass
+
+    def add_user(self, username):
+        pass
+
+    def del_user(self, username):
+        pass
+
+    def get_user(self, username):
+        ldap_client = self._connect()
+        try:
+            ldap_client.simple_bind_s(self.binddn, self.bindpassword)
+        except ldap.INVALID_CREDENTIALS:
+            self._logger(
+                    logging.ERROR,
+                    "Configuration error, wrong credentials, unable to connect to ldap with '" + self.config['binddn'] + "'"
+                )
+            raise cherrypy.HTTPError("500", "Configuration Error, contact administrator")
+        except ldap.SERVER_DOWN:
+            self._logger(
+                    logging.ERROR,
+                    "Unable to contact ldap server '" + self.config['uri'] + "', check 'auth.ldap.uri' and ssl/tls configuration"
+                )
+            return False
+
+        user_filter = self.config['user_filter_tmpl'] % {
+            'login': username
+            }
+
+        r = ldap_client.search_s(self.userdn,
+                ldap.SCOPE_SUBTREE,
+                user_filter
+                 )
+        if len(r) == 0:
+            ldap_client.unbind_s()
+            return False
+
+        dn_entry = r[0][0]
+        return dn_entry
+
+    def _connect(self):
+        ldap_client = ldap.initialize(self.config['uri'])
+        ldap_client.set_option(ldap.OPT_REFERRALS, 0)
+        if self.config['starttls'] == 'on':
+           ldap.set_option(ldap.OPT_X_TLS_DEMAND, True)
+        if self.config['starttls'] == 'on':
+            ldap.set_option(ldap.OPT_X_TLS_DEMAND, True)
+        if self.config['ca']:
+            ldap.set_option(ldap.OPT_X_TLS_CACERTFILE, self.config['ca'])
+        if self.config['checkcert'] == 'off':
+            ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_ALLOW)
+        else:
+            ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT,ldap.OPT_X_TLS_DEMAND)
+
+        if self.config['starttls'] == 'on':
+            try:
+                ldap_client.start_tls_s()
+            except ldap.OPERATIONS_ERROR:
+                self._logger(
+                    logging.ERROR,
+                    "cannot use starttls with ldaps:// uri (uri: " + self.config['uri'] + ")"
+                )
+                raise cherrypy.HTTPError("500", "Configuration Error, contact administrator")
+        return ldap_client
diff --git a/ldapcherry/backend/backendSamba4.py b/ldapcherry/backend/backendSamba4.py
new file mode 100644
index 0000000..8f490e1
--- /dev/null
+++ b/ldapcherry/backend/backendSamba4.py
@@ -0,0 +1,13 @@
+# -*- coding: utf-8 -*-
+# vim:set expandtab tabstop=4 shiftwidth=4:
+#
+# License GPLv3
+# LdapCherry
+# Copyright (c) 2014 Carpentier Pierre-Francois
+
+import ldapcherry.backend
+
+class Backend(ldapcherry.backend.Backend):
+
+    def __init__(self, config, logger):
+        pass
diff --git a/ldapcherry/backend/ldap.py b/ldapcherry/backend/ldap.py
deleted file mode 100644
index b1d930f..0000000
--- a/ldapcherry/backend/ldap.py
+++ /dev/null
@@ -1,103 +0,0 @@
-# -*- coding: utf-8 -*-
-# vim:set expandtab tabstop=4 shiftwidth=4:
-#
-# The MIT License (MIT)
-# LdapCherry
-# Copyright (c) 2014 Carpentier Pierre-Francois
-
-import cherrypy
-import ldap
-import logging
-import ldapcherry.backend
-
-class Backend(ldapcherry.backend.Backend):
-
-    def __init__(self, config, logger):
-        self.config = config
-
-    def auth(self, username, password):
-
-        binddn = get_user(username)
-        if binddn:
-            ldap_client = self._connect()
-            try:
-                ldap_client.simple_bind_s(binddn, password)
-            except ldap.INVALID_CREDENTIALS:
-                ldap_client.unbind_s()
-                return False
-            ldap_client.unbind_s()
-            return True
-        else:
-            return False
-
-    def add_to_group(self):
-        pass
-
-    def set_attrs(self, attrs):
-        pass
-
-    def rm_from_group(self):
-        pass
-
-    def add_user(self, username):
-        pass
-
-    def del_user(self, username):
-        pass
-
-    def get_user(self, username):
-        ldap_client = self._connect()
-        try:
-            ldap_client.simple_bind_s(self.binddn, self.bindpassword)
-        except ldap.INVALID_CREDENTIALS:
-            self._logger(
-                    logging.ERROR,
-                    "Configuration error, wrong credentials, unable to connect to ldap with '" + self.binddn + "'"
-                )
-            raise cherrypy.HTTPError("500", "Configuration Error, contact administrator")
-        except ldap.SERVER_DOWN:
-            self._logger(
-                    logging.ERROR,
-                    "Unable to contact ldap server '" + self.uri + "', check 'auth.ldap.uri' and ssl/tls configuration"
-                )
-            return False
-
-        user_filter = self.config['user_filter_tmpl'] % {
-            'login': username
-            }
-
-        r = ldap_client.search_s(self.userdn,
-                ldap.SCOPE_SUBTREE,
-                user_filter
-                 )
-        if len(r) == 0:
-            ldap_client.unbind_s()
-            return False
-
-        dn_entry = r[0][0]
-        return dn_entry
-
-    def _connect(self):
-        ldap_client = ldap.initialize(self.config['uri'])
-        ldap_client.set_option(ldap.OPT_REFERRALS, 0)
-        if self.config['starttls'] == 'on':
-           ldap.set_option(ldap.OPT_X_TLS_DEMAND, True)
-        if self.config['starttls'] == 'on':
-            ldap.set_option(ldap.OPT_X_TLS_DEMAND, True)
-        if self.ca:
-            ldap.set_option(ldap.OPT_X_TLS_CACERTFILE, self.config['ca'])
-        if self.checkcert == 'off':
-            ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_ALLOW)
-        else:
-            ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT,ldap.OPT_X_TLS_DEMAND)
-
-        if self.config['starttls'] == 'on':
-            try:
-                ldap_client.start_tls_s()
-            except ldap.OPERATIONS_ERROR:
-                self._logger(
-                    logging.ERROR,
-                    "cannot use starttls with ldaps:// uri (uri: " + self.uri + ")"
-                )
-                raise cherrypy.HTTPError("500", "Configuration Error, contact administrator")
-        return ldap_client
diff --git a/ldapcherry/backend/samba4.py b/ldapcherry/backend/samba4.py
deleted file mode 100644
index 8f490e1..0000000
--- a/ldapcherry/backend/samba4.py
+++ /dev/null
@@ -1,13 +0,0 @@
-# -*- coding: utf-8 -*-
-# vim:set expandtab tabstop=4 shiftwidth=4:
-#
-# License GPLv3
-# LdapCherry
-# Copyright (c) 2014 Carpentier Pierre-Francois
-
-import ldapcherry.backend
-
-class Backend(ldapcherry.backend.Backend):
-
-    def __init__(self, config, logger):
-        pass