diff --git a/pyrelacs/dataio/nix_writer.py b/pyrelacs/dataio/nix_writer.py
index decc2c7..f745a25 100644
--- a/pyrelacs/dataio/nix_writer.py
+++ b/pyrelacs/dataio/nix_writer.py
@@ -1,4 +1,9 @@
+from datetime import datetime
+import itertools
+import string
 import time
+from dataclasses import asdict
+
 from IPython import embed
 from PyQt6.QtCore import QMutex
 import nixio
@@ -10,8 +15,9 @@ log = config_logging()
 
 
 class NixWriter:
-    def __init__(self, buffer: CircBuffer) -> None:
+    def __init__(self, buffer: CircBuffer, config) -> None:
         self.buffer = buffer
+        self.config = config
 
     def write_nix(
         self,
@@ -68,5 +74,33 @@ class NixWriter:
             "Analog1", "ndarray", shape=(1000,), dtype=nixio.DataType.Double
         )
 
+    def generate_letter_sequence(self):
+        alphabet = string.ascii_lowercase
+        for size in range(2, 3):
+            for combo in itertools.product(alphabet, repeat=size):
+                yield "".join(combo)
+
+    def create_nix_file(self, file_path, metadata):
+        data_time = datetime.now().strftime("%Y-%m-%t_%H-%M-%S")
+        sequence_generator = self.generate_letter_sequence()
+        sequence = next(sequence_generator)
+
+        self.nix_file = nixio.File.open(
+            path=f"{file_path}/{data_time}_{sequence}.nix",
+            mode=nixio.FileMode.Overwrite,
+        )
+        self.block = self.nix_file.create_block("recording", "testfile")
+        self.section = self.nix_file.create_section("metadata", "config.yaml")
+        for key, value in asdict(metadata).items():
+            self.section[key] = value
+
+        self.data_array_analog1 = self.block.create_data_array(
+            "Analog1", "ndarray", shape=(1000,), dtype=nixio.DataType.Double
+        )
+        self.data_array_analog2 = self.block.create_data_array(
+            "Analog2", "ndarray", shape=(1000,), dtype=nixio.DataType.Double
+        )
+        return self.data_array_analog1, self.data_array_analog2
+
     def stop_writing(self):
         self.write = False