diff --git a/doc/program.rst b/doc/program.rst
index 38f3168e3358e97a3028b87ad467ed499376c37f..0d7d3369085976cfd47fbab51c92a813cf14bf85 100644
--- a/doc/program.rst
+++ b/doc/program.rst
@@ -15,10 +15,10 @@ submit a python script:
 .. code-block:: python
 
    import sys
-   from gridtk.sge import JobManager
+   from gridtk.sge import JobManagerSGE
    from gridtk.tools import make_shell
 
-   manager = JobManager()
+   manager = JobManagerSGE()
    command = make_shell(sys.executable, ['myscript.py', '--help'])
    job = manager.submit(command)
 
diff --git a/gridtk/manager.py b/gridtk/manager.py
index 30224a9642357d82cbb405dfa72ab97fb38537b1..3553d58b845e6120e40715bb72a4c24e7950b383 100644
--- a/gridtk/manager.py
+++ b/gridtk/manager.py
@@ -15,7 +15,7 @@ from distutils.version import LooseVersion
 class JobManager:
   """This job manager defines the basic interface for handling jobs in the SQL database."""
 
-  def __init__(self, database, wrapper_script = None, debug = False):
+  def __init__(self, database = 'submitted.sql3', wrapper_script = None, debug = False):
     self._database = os.path.realpath(database)
     self._engine = sqlalchemy.create_engine("sqlite:///"+self._database, connect_args={'timeout': 600}, echo=debug)
     self._session_maker = sqlalchemy.orm.sessionmaker(bind=self._engine)