diff --git a/config.ini b/config.ini
index 894d434..8d7b7e2 100755
--- a/config.ini
+++ b/config.ini
@@ -4,6 +4,13 @@
 lang = fr
 db_url = sqlite:///db.sqlite
 newcomment_polling = 60
+db_file = db.json
+
+[site]
+name = "My blog"
+url = http://blog.mydomain.com
+token = aabbccddeeffgghhiijjkkllmm
+admin_email = admin@mydomain.com
 
 [http]
 host = 127.0.0.1
diff --git a/stacosys/conf/config.py b/stacosys/conf/config.py
index 712a77f..a4742d3 100644
--- a/stacosys/conf/config.py
+++ b/stacosys/conf/config.py
@@ -7,6 +7,7 @@ import profig
 FLASK_APP = 'flask.app'
 
 DB_URL = 'main.db_url'
+DB_FILE = 'main.db_file'
 LANG = 'main.lang'
 COMMENT_POLLING = 'main.newcomment_polling'
 
@@ -29,6 +30,10 @@ SMTP_PORT = 'smtp.port'
 SMTP_LOGIN = 'smtp.login'
 SMTP_PASSWORD = 'smtp.password'
 
+SITE_NAME = 'site.name'
+SITE_URL = 'site.url'
+SITE_TOKEN = 'site.token'
+SITE_ADMIN_EMAIL = 'site.admin_email'
 
 # variable
 params = dict()
diff --git a/stacosys/core/database.py b/stacosys/core/database.py
index a50165b..5be8287 100644
--- a/stacosys/core/database.py
+++ b/stacosys/core/database.py
@@ -16,23 +16,26 @@ def setup():
 
     get_db().create_tables([Site, Comment], safe=True)
 
+
 from playhouse.shortcuts import model_to_dict
 import json
 
+
 def tojson_model(comment):
     dcomment = model_to_dict(comment)
-    del dcomment['site']
+    del dcomment["site"]
     tcomment = json.dumps(dcomment, indent=4, sort_keys=True, default=str)
-    return json.loads(tcomment) 
+    return json.loads(tcomment)
 
-def tojson_models(models):
-    print(json.dumps(list(models.dicts()), indent=4, sort_keys=True, default=str))
 
 def dump_db():
     from tinydb import TinyDB, Query
     from stacosys.model.comment import Comment
-    db = TinyDB('db.json')
+
+    db = TinyDB("db.json", sort_keys=True, indent=4, separators=(",", ": "))
+    db.drop_tables()
+    table = db.table("comments")
     for comment in Comment.select():
         cc = tojson_model(comment)
         print(cc)
-        db.insert(cc)
+        table.insert(cc)
diff --git a/stacosys/core/persistence.py b/stacosys/core/persistence.py
new file mode 100644
index 0000000..32351dd
--- /dev/null
+++ b/stacosys/core/persistence.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+
+from tinydb import TinyDB
+from tinydb.storages import MemoryStorage
+
+from stacosys.conf import config
+
+
+class Persistence:
+    def __init__(self):
+        db_file = config.get(config.DB_FILE)
+        if db_file:
+            self.db = TinyDB(db_file, sort_keys=True, indent=4, separators=(",", ": "))
+        else:
+            self.db = TinyDB(storage=MemoryStorage)
+
+    def get_db(self):
+        return self.db
+
+    def get_table_comments(self):
+        return self.db.table("comments")
diff --git a/tests/test_persistence.py b/tests/test_persistence.py
new file mode 100644
index 0000000..d4dd92d
--- /dev/null
+++ b/tests/test_persistence.py
@@ -0,0 +1,20 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+
+import pytest
+
+
+@pytest.fixture
+def persistence():
+    from stacosys.conf import config
+
+    config.params = {"main.db_file": None}
+    from stacosys.core import persistence
+
+    return persistence.Persistence()
+
+
+def test_init_persistence(persistence):
+    assert persistence is not None
+    assert persistence.get_db() is not None
+    assert persistence.get_table_comments() is not None
diff --git a/tests/test_stacosys.py b/tests/test_stacosys.py
index f0d2e64..124b4fa 100644
--- a/tests/test_stacosys.py
+++ b/tests/test_stacosys.py
@@ -2,4 +2,4 @@ from stacosys import __version__
 
 
 def test_version():
-    assert __version__ == '0.1.0'
+    assert __version__ == '1.1.0'