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 0edc308..e039d2f 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
@@ -2,6 +2,7 @@ package eu.dnetlib.ariadneplus.graphdb;
 
 import java.io.File;
 import java.io.IOException;
+import java.net.MalformedURLException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
@@ -302,31 +303,33 @@ public class GraphDBClient {
 	}
 
 	public String  feedFromURL(final String dataUrl, final String context) throws AriadnePlusPublisherException{
-		try {
-			String result = "";
-			RemoteRepositoryManager manager = new RemoteRepositoryManager(this.graphDBServerUrl);
-			manager.init();
-			manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
-			Repository repository = manager.getRepository(getRepository());
-			ValueFactory factory = repository.getValueFactory();
-			try (RepositoryConnection con = repository.getConnection()) {
-				con.begin();
-				IRI contextIRI = factory.createIRI(getGraphDBBaseURI(), context);
-				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 e) {
-				log.error("error executing query ...", e);
-			}
-			repository.shutDown();
-			manager.shutDown();
-			return result;
-		}catch(Throwable e){
-			log.error(e);
+		String result = "";
+		RemoteRepositoryManager manager = new RemoteRepositoryManager(this.graphDBServerUrl);
+		manager.init();
+		manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
+		Repository repository = manager.getRepository(getRepository());
+		ValueFactory factory = repository.getValueFactory();
+		try (RepositoryConnection con = repository.getConnection()) {
+			con.begin();
+			IRI contextIRI = factory.createIRI(getGraphDBBaseURI(), context);
+			log.debug("adding data from IRI: "+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();
+		}
+		return result;
 	}
 
 	public RunSPARQLQueryService getRunSPQRLQuery() {