diff --git a/src/brovski-adress-etiketten-verwaltung.py b/src/brovski-adress-etiketten-verwaltung.py
index 71e1423..aeb6c7c 100644
--- a/src/brovski-adress-etiketten-verwaltung.py
+++ b/src/brovski-adress-etiketten-verwaltung.py
@@ -8,6 +8,7 @@ from tkinter import ttk
 
 from config import Config
 from connector import JSONConnector
+from model import Model
 from windows import SettingsWindow, EditRecord, show_error
 
 
@@ -36,7 +37,7 @@ class Application:
         self.filter_active = tk.BooleanVar(value=False)
 
         # model connector
-        self.model = JSONConnector()
+        self.model = Model(JSONConnector())
 
         # init paths to json and csv file
         self.json_file_name = "brovski-adress-etiketten-verwaltung.json"
diff --git a/src/connector.py b/src/connector.py
index 436ea86..f3f4c9f 100644
--- a/src/connector.py
+++ b/src/connector.py
@@ -29,6 +29,10 @@ class Connector(ABC):
     def create_new(self, values: dict) -> int:
         pass
 
+    @abstractmethod
+    def get_all_sorted_by(self, field: str, reverse: bool = False) -> list:
+        pass
+
 
 class JSONConnector(Connector):
     def __init__(self):
@@ -78,5 +82,5 @@ class JSONConnector(Connector):
         return next_id
 
     def _write_to_file(self, data):
-        with open(self.json_file, "w") as f:
-            json.dump(data, f, indent=4)
+        with open(self.json_file, "w", encoding="UTF-8") as f:
+            json.dump(data, f, indent=4, ensure_ascii=False)
diff --git a/src/model.py b/src/model.py
new file mode 100644
index 0000000..1c7164c
--- /dev/null
+++ b/src/model.py
@@ -0,0 +1,24 @@
+from connector import JSONConnector, Connector
+
+
+class Model:
+    def __init__(self, connector: Connector):
+        self.connector = connector
+
+    def get_all(self):
+        return self.connector.get_all()
+
+    def get_all_sorted_by(self, field: str, reverse: bool = False):
+        return self.connector.get_all_sorted_by(field=field, reverse=reverse)
+
+    def get_by_id(self, record_id: int):
+        return self.connector.get_by_id(record_id)
+
+    def delete_by_id(self, record_id: int):
+        self.connector.delete_by_id(record_id)
+
+    def update_record(self, new_record: dict):
+        self.connector.update_record(new_record)
+
+    def create_new(self, record: dict):
+        self.connector.create_new(record)
\ No newline at end of file