diff --git a/docs/code.rst b/docs/code.rst
index 2b273a7..227508a 100644
--- a/docs/code.rst
+++ b/docs/code.rst
@@ -29,6 +29,12 @@ The project module :py:mod:`gvafile`
 .. automodule:: gvafile.urls
 
 
+:py:mod:`gvafile.exceptions`
+----------------------------
+
+.. automodule:: gvafile.exceptions
+
+
 :py:mod:`gvafile.wsgi`
 ----------------------
 
diff --git a/docs/conf.py b/docs/conf.py
index dc4f85e..daa0c8d 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -14,6 +14,7 @@
 
 import sys
 import os
+import django
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -22,6 +23,10 @@ sys.path.insert(0, os.path.abspath(os.path.join('..', 'gvafile')))
 
 os.environ['GVAFILE_ALLOWED_HOSTS'] = 'localhost'
 os.environ['GVAFILE_SERVER_EMAIL'] = 'root@localhost'
+os.environ['GVAFILE_SFTP_DIRECTORY'] = '/home/www'
+os.environ['GVAFILE_MAIL_DIRECTORY'] = '/home/mail'
+
+django.setup()
 
 # -- General configuration -----------------------------------------------------
 
diff --git a/gvafile/gvafile/exceptions.py b/gvafile/gvafile/exceptions.py
new file mode 100644
index 0000000..06f6cfb
--- /dev/null
+++ b/gvafile/gvafile/exceptions.py
@@ -0,0 +1,12 @@
+"""
+This module defines exceptions for gvafile.
+
+"""
+from __future__ import unicode_literals
+
+
+class GVAFileException(Exception):
+    """
+    Generic Exception class for gvafile.
+
+    """
diff --git a/gvafile/osusers/tasks.py b/gvafile/osusers/tasks.py
index 34b09e4..65c8091 100644
--- a/gvafile/osusers/tasks.py
+++ b/gvafile/osusers/tasks.py
@@ -13,7 +13,8 @@ from django.conf import settings
 
 from celery import shared_task
 from celery.utils.log import get_task_logger
-from celery.exceptions import Reject
+
+from gvafile.exceptions import GVAFileException
 
 
 _logger = get_task_logger(__name__)
@@ -60,7 +61,7 @@ def setup_file_sftp_userdir(username):
     except subprocess.CalledProcessError:
         _logger.exception(
             'could not create SFTP directory for user %s', username)
-        raise Exception(
+        raise GVAFileException(
             "could not create SFTP directory for user %s" % username)
     return sftp_directory