diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java
index e039d2f..c587211 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java
@@ -309,25 +309,28 @@ public class GraphDBClient {
 		manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
 		Repository repository = manager.getRepository(getRepository());
 		ValueFactory factory = repository.getValueFactory();
-		try (RepositoryConnection con = repository.getConnection()) {
+		try {
+			RepositoryConnection con = repository.getConnection();
 			con.begin();
 			IRI contextIRI = factory.createIRI(getGraphDBBaseURI(), context);
-			log.debug("adding data from IRI: "+contextIRI.toString());
+			log.debug("adding data from: "+dataUrl+" to context: "+contextIRI.toString());
 			con.add(new URL(dataUrl), null, RDFFormat.TURTLE, contextIRI);
 			result.concat("data added from url: "+dataUrl+" into graph "+context);
 			con.commit();
 			log.debug("add data from Url executed");
 		}
 		catch (RDF4JException | MalformedURLException e) {
-			log.error("error executing query ...", e);
 			throw new AriadnePlusPublisherException(e);
 		} catch (IOException e) {
-			log.error("error executing query ...", e);
 			throw new AriadnePlusPublisherException(e);
 		}
 		finally {
-			repository.shutDown();
-			manager.shutDown();
+			try {
+				repository.shutDown();
+				manager.shutDown();
+			} catch (Exception e) {
+
+			}
 		}
 		return result;
 	}