diff --git a/frontend/models.py b/frontend/models.py
index 2c55e67..f57520f 100644
--- a/frontend/models.py
+++ b/frontend/models.py
@@ -6,8 +6,8 @@ from django.db import models
 class Project(models.Model):
     name = models.CharField(max_length=255)
     description = models.TextField()
-    associated_filename = models.CharField(max_length=255,blank=True,null=True)
-    
+    associated_filename = models.CharField(max_length=255, blank=True, null=True)
+
     def __unicode__(self):
         repr = self.name
         if self.associated_filename:
@@ -19,7 +19,7 @@ class Project(models.Model):
 
 class PersonGlobalIdentity(models.Model):
     type = models.CharField(max_length=255)
-    #TODO: Extend this for further stuff - maybe vivo external  url or something?
+    # TODO: Extend this for further stuff - maybe vivo external  url or something?
 
     def __unicode__(self):
         repr = "<PersonGlobalIdentity ID=" + str(self.id) + ", type=" + self.type + ">"
@@ -31,7 +31,7 @@ class  CitaviProjectIdentity(models.Model):
     project_id = models.ForeignKey(Project, blank=False, null=False)
     citavi_uuid = models.CharField(max_length=255, blank=False, null=False)
     preferred_id = models.BooleanField()
-    
+
     def __unicode__(self):
         repr = "<CitaviProjectIdentity project_id=" + str(self.project_id) + ", citavi_uuid=" + self.citavi_uuid + ", global_identity=" + str(self.global_identity) + ", preferred=" + str(self.preferred_id) + ">"
-        return repr
\ No newline at end of file
+        return repr
diff --git a/frontend/views.py b/frontend/views.py
index de6155b..6ce8877 100644
--- a/frontend/views.py
+++ b/frontend/views.py
@@ -34,7 +34,7 @@ def logout_wrap(*args, **kwargs):
         'page': {
             'name': FRONTEND_PAGE_NAME,
             'title': 'Logout'
-        }                           
+        }
     }
     return logout(*args, **kwargs)
 
@@ -44,13 +44,13 @@ class MyViewMixin(object):
     template_name = 'base.html'
     page_name = FRONTEND_PAGE_NAME
     page_title = 'BASE'
-        
+
     def get_page_data(self):
         return {
             u'name': self.page_name,
             u'title': self.page_title
         }
-    
+
     def get_context_data(self, **kwargs):
         kwargs[u'page'] = self.get_page_data()
         return super(MyViewMixin, self).get_context_data(**kwargs)
@@ -60,7 +60,7 @@ class MyTemplateView(MyViewMixin, TemplateView):
 
 class MyFormView(MyViewMixin, FormView):
     pass
-    
+
 class MyCreateView(MyViewMixin, CreateView):
     pass
 
@@ -99,22 +99,22 @@ class ProjectOverView(ProtectedFormView):
     page_title = 'Projects'
     form_class = NewProjectForm
     success_url = '/projects'
-    
+
     def get_context_data(self, **kwargs):
         kwargs[u'projects'] = Project.objects.order_by('id')
         return super(ProjectOverView, self).get_context_data(**kwargs)
-    
+
     def form_valid(self, form):
         form.save()
         return super(ProjectOverView, self).form_valid(form)
-    
+
 class UpdateProjectView(ProtectedFormView, SingleObjectMixin):
     template_name = 'project.html'
     page_title = 'Update project'
     form_class = FileUploadForm
 
     success_url = '/projects/'
-       
+
     def get(self, request, *args, **kwargs):
         self.project_id = kwargs[u'project_id']
         self.object = Project.objects.get(pk=self.project_id)
@@ -124,7 +124,7 @@ class UpdateProjectView(ProtectedFormView, SingleObjectMixin):
         self.project_id = kwargs[u'project_id']
         self.success_url = self.success_url + self.project_id + '/update'
         return super(UpdateProjectView, self).post(request, *args, **kwargs)
-    
+
     def form_valid(self, form, *args, **kwargs):
         """ This form_valid handles the file upload. """
         original_file = form.files[u'file']
@@ -134,15 +134,16 @@ class UpdateProjectView(ProtectedFormView, SingleObjectMixin):
         target_filename = 'tmp/project_' + str(self.project_id) + '.ctt4'
         relative_path = default_storage.save(target_filename, original_contentfile)
         temp_sqlite = os.path.join(settings.MEDIA_ROOT, relative_path)
-        
+
         """ Test if SQLite is a valid citavi project. """
         from service import Citavi
         citavi_project = Citavi.Project(temp_sqlite)
+        citavi_project.open()
         citavi_project_valid = citavi_project.is_valid()
         """ Free temporary ressources. """
         del citavi_project
         default_storage.delete(temp_sqlite)
-        
+
         if citavi_project_valid == False:
             """ TODO: Put up an error message or something. """
             pass
@@ -160,10 +161,11 @@ class UpdateProjectView(ProtectedFormView, SingleObjectMixin):
             project = Project.objects.get(id=self.project_id)
             project.associated_filename = original_filename
             project.save()
-            
+
             """ Refresh identities from citavi project. """
             # TODO
-            #citavi_project = Citavi.Project(sqlite_path)
-            #del citavi_project
+            # citavi_project = Citavi.Project(sqlite_path)
+            # citavi_project.open()
+            # del citavi_project
         return super(UpdateProjectView, self).form_valid(form)
 
diff --git a/service/Citavi.py b/service/Citavi.py
index 40203ec..19ce0f8 100644
--- a/service/Citavi.py
+++ b/service/Citavi.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from sqlalchemy import create_engine,  MetaData
+from sqlalchemy import create_engine, MetaData
 from sqlalchemy.ext.automap import automap_base
 from sqlalchemy.orm import Session
 
@@ -12,7 +12,7 @@ class Project():
         self.sqlite_file = sqlite_file
         self._is_open = False
         self._is_error = False
-        self._sa = {} # Object namespace for sqlalchemy related objects
+        self._sa = {}  # Object namespace for sqlalchemy related objects
 
     def __del__(self):
         """ Destructor to close the citavi file. """
@@ -172,4 +172,4 @@ def import_sqlite(project_id, sqlite_file):
             print table_name + "." + column_name + ': ' + column_type
         print
     print
-"""
\ No newline at end of file
+"""