diff --git a/output_handlers/base_handler.py b/output_handlers/base_handler.py
index 67d4886..bd8f20b 100644
--- a/output_handlers/base_handler.py
+++ b/output_handlers/base_handler.py
@@ -11,6 +11,8 @@ class BaseHandler(ABC):
     """
 
     logger = logging.getLogger(__name__)
+    _successful_writes = 0
+    _failed_writes = 0
 
     def __init__(self, fail_on_error: bool = True, **kwargs):
         """
@@ -48,8 +50,10 @@ class BaseHandler(ABC):
         success = await self._write_entry(entry, uid)
         if success:
             self.logger.debug(f"Successfully wrote entry with UID {uid}")
+            self._successful_writes += 1
         else:
             self.logger.error(f"Failed to write entry with UID {uid}")
+            self._failed_writes += 1
             if self.fail_on_error:
                 raise Exception(f"Failed to write entry with UID {uid}")
 
@@ -58,4 +62,4 @@ class BaseHandler(ABC):
         """
         Closes the handler. This method should be overridden by subclasses if they need to perform any cleanup operations.
         """
-        pass
+        self.logger.info(f"Wrote {self._successful_writes+self._failed_writes} entries: {self._successful_writes} successful, {self._failed_writes} failed.")
diff --git a/output_handlers/bunny_storage.py b/output_handlers/bunny_storage.py
index 553fbbb..5958d9f 100644
--- a/output_handlers/bunny_storage.py
+++ b/output_handlers/bunny_storage.py
@@ -51,4 +51,5 @@ class BunnyStorageHandler(BaseHandler):
 
     async def close(self):
         await self._session.close()
-        await self._connector.close()
\ No newline at end of file
+        await self._connector.close()
+        await super().close()
diff --git a/transform-documents.py b/transform-documents.py
index 0a7508f..758c227 100644
--- a/transform-documents.py
+++ b/transform-documents.py
@@ -5,9 +5,10 @@ import asyncio
 import importlib
 import logging
 from dotenv import load_dotenv
-
 from parser import WikivoyageParser
 
+logger = logging.getLogger(__name__)
+
 async def process_file(
     input_file: Path,
     handler,
@@ -43,7 +44,7 @@ def gather_handler_kwargs(handler_name: str) -> dict:
         elif val.lower() in ("true", "false"):
             val = val.lower() == "true"
         kwargs[param] = val
-    print(f"Handler kwargs: {kwargs}")
+    logger.debug(f"Handler kwargs: {kwargs}")
     return kwargs
 
 async def main():
@@ -80,19 +81,17 @@ async def main():
     txt_files = list(input_dir.rglob("*.txt"))
 
     if not txt_files:
-        print(f"No .txt files found under {input_dir}")
+        logger.info(f"No .txt files found under {input_dir}")
         sys.exit(1)
 
     # 7. read concurrency setting
     try:
         max_conc = int(os.getenv("MAX_CONCURRENT", "0"))
     except ValueError:
-        print("Error: MAX_CONCURRENT must be an integer")
-        sys.exit(1)
+        raise ValueError("MAX_CONCURRENT must be an integer")
 
     if max_conc < 0:
-        print("Error: MAX_CONCURRENT must be >= 0")
-        sys.exit(1)
+        raise ValueError("MAX_CONCURRENT must be >= 0")
 
     # 8. schedule tasks
     if max_conc == 0:
@@ -119,7 +118,7 @@ async def main():
     await handler.close()
 
 
-    print("All done.")
+    logger.info("All done.")
 
 
 if __name__ == "__main__":