diff --git a/weboob/core/ouiboube.py b/weboob/core/ouiboube.py
index 5d314198..83051eeb 100644
--- a/weboob/core/ouiboube.py
+++ b/weboob/core/ouiboube.py
@@ -34,7 +34,7 @@ class Weboob(object):
     WORKDIR = os.path.join(os.path.expanduser('~'), '.weboob')
     BACKENDS_FILENAME = 'backends'
 
-    def __init__(self, workdir=WORKDIR, backends_filename=None, scheduler=None):
+    def __init__(self, workdir=WORKDIR, backends_filename=None, scheduler=None, storage=None):
         self.workdir = workdir
         self.backend_instances = {}
 
@@ -59,8 +59,20 @@ class Weboob(object):
             backends_filename = os.path.join(self.workdir, backends_filename)
         self.backends_config = BackendsConfig(backends_filename)
 
+        # Storage
+        self.storage = storage
+
+    def __deinit__(self):
+        self.deinit()
+
+    def deinit(self):
+        self.unload_backends()
+
     def load_backends(self, caps=None, names=None, storage=None):
         loaded = {}
+        if storage is None:
+            storage = self.storage
+
         self.backends_loader.load_all()
         for backend_name, backend in self.backends_loader.loaded.iteritems():
             if caps is not None and not backend.has_caps(caps) or \
@@ -72,6 +84,9 @@ class Weboob(object):
 
     def load_configured_backends(self, caps=None, names=None, storage=None):
         loaded = {}
+        if storage is None:
+            storage = self.storage
+
         for instance_name, backend_name, params in self.backends_config.iter_backends():
             if '_enabled' in params and not params['_enabled']:
                 continue
diff --git a/weboob/tools/application/base.py b/weboob/tools/application/base.py
index 8dc67ec4..6fc55a79 100644
--- a/weboob/tools/application/base.py
+++ b/weboob/tools/application/base.py
@@ -115,12 +115,16 @@ class BaseApplication(object):
         self._parser.add_option_group(logging_options)
         self._parser.add_option('--shell-completion', action='store_true', help=optparse.SUPPRESS_HELP)
 
-    def create_storage(self, path=None, klass=None):
+    def deinit(self):
+        self.weboob.deinit()
+
+    def create_storage(self, path=None, klass=None, localonly=False):
         """
         Create a storage object.
 
         @param path [str]  an optional specific path.
         @param klass [IStorage]  what klass to instance.
+        @param localonly [bool]  if True, do not set it on the Weboob object.
         @return  a IStorage object
         """
         if klass is None:
@@ -135,6 +139,10 @@ class BaseApplication(object):
         storage = klass(path)
         self.storage = ApplicationStorage(self.APPNAME, storage)
         self.storage.load(self.STORAGE)
+
+        if not localonly:
+            self.weboob.storage = storage
+
         return storage
 
     def load_config(self, path=None, klass=None):
@@ -259,10 +267,13 @@ class BaseApplication(object):
         app._handle_app_options()
 
         try:
-            sys.exit(app.main(args))
-        except KeyboardInterrupt:
-            print 'Program killed by SIGINT'
-            sys.exit(0) # XXX is it really the right exit code? -romain
-        except ConfigError, e:
-            print 'Configuration error: %s' % e
-            sys.exit(1)
+            try:
+                sys.exit(app.main(args))
+            except KeyboardInterrupt:
+                print 'Program killed by SIGINT'
+                sys.exit(0) # XXX is it really the right exit code? -romain
+            except ConfigError, e:
+                print 'Configuration error: %s' % e
+                sys.exit(1)
+        finally:
+            app.deinit()
diff --git a/weboob/tools/backend.py b/weboob/tools/backend.py
index 88407dc9..49b46720 100644
--- a/weboob/tools/backend.py
+++ b/weboob/tools/backend.py
@@ -130,6 +130,12 @@ class BaseBackend(object):
         self.storage = BackendStorage(self.name, storage)
         self.storage.load(self.STORAGE)
 
+    def deinit(self):
+        """
+        This abstract method is called when the backend is unloaded.
+        """
+        pass
+
     @property
     def browser(self):
         """