diff --git a/dummy-service/__init__.py b/dummy-service/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..9c847747453665c332c6dd80107c138189275a80
--- /dev/null
+++ b/dummy-service/__init__.py
@@ -0,0 +1,4 @@
+import logging
+
+logger = logging.getLogger(__name__)   
+ 
\ No newline at end of file
diff --git a/dummy-service/dummyService.py b/dummy-service/dummyService.py
new file mode 100644
index 0000000000000000000000000000000000000000..9c847747453665c332c6dd80107c138189275a80
--- /dev/null
+++ b/dummy-service/dummyService.py
@@ -0,0 +1,4 @@
+import logging
+
+logger = logging.getLogger(__name__)   
+ 
\ No newline at end of file
diff --git a/interface/TextMiningService.py b/interface/TextMiningService.py
index 8e7683290163b5846f0aa514f6b699667cf44028..bd0c219838daaff0ad764e65ed96c9cb3a3d90db 100644
--- a/interface/TextMiningService.py
+++ b/interface/TextMiningService.py
@@ -3,7 +3,7 @@ from typing import List
 
 
 class Publication:
-    def __init__(self, pmc_id, pm_id, doi, preprint_id, other_id):
+    def __init__(self, pmc_id=None, pm_id=None, doi=None, preprint_id=None, other_id=None):
         self.pmc_id = pmc_id
         self.pm_id = pm_id
         self.doi = doi