diff --git a/src/config_file.py b/src/config_file.py
new file mode 100644
index 0000000..600dd9d
--- /dev/null
+++ b/src/config_file.py
@@ -0,0 +1,16 @@
+
+from g5505_file_reader import read_xps_ibw_file_as_dict, copy_file_in_group
+from smog_chamber_file_reader import read_txt_files_as_dict 
+
+
+select_file_readers = '5505'
+
+if select_file_readers == 'smog_chamber':
+    ext_to_reader_dict = {'.ibw': read_xps_ibw_file_as_dict,
+                        '.txt': read_txt_files_as_dict,
+                        '.TXT': read_txt_files_as_dict,
+                        '.h5': copy_file_in_group}
+    
+elif select_file_readers == '5505':
+    ext_to_reader_dict = {'.ibw': read_xps_ibw_file_as_dict,
+                        '.h5': copy_file_in_group}
\ No newline at end of file