No error if files cannot be opened

patacrep/index.py

@@ -40,11 +40,13 @@ def process_sxd(filename):
     Return an Index object.
     """
     data = []
+    index_file = None
     try:
         index_file = encoding.open_read(filename, 'r')
         for line in index_file:
             data.append(line.strip())
     finally:
+        if index_file:
             index_file.close()
 
     i = 1

patacrep/templates.py

@@ -177,6 +177,7 @@ class TexRenderer(object):
         """
 
         subvariables = {}
+        template_file = None
         templatename = self.texenv.get_template(template).filename
         try:
             template_file = encoding.open_read(templatename, 'r')
@@ -200,6 +201,7 @@ class TexRenderer(object):
                                     )
                                 )
         finally:
+            if template_file:
                 template_file.close()
 
         return (subvariables, subtemplates)

songbook

@@ -101,6 +101,7 @@ def main():
 
     basename = os.path.basename(songbook_path)[:-3]
 
+    songbook_file = None
     try:
         songbook_file = encoding.open_read(songbook_path)
         songbook = json.load(songbook_file)
@@ -109,6 +110,7 @@ def main():
         LOGGER.error("Error while loading file '{}'.".format(songbook_path))
         sys.exit(1)
     finally:
+        if songbook_file:
             songbook_file.close()
 
     # Gathering datadirs