diff --git a/pom.xml b/pom.xml
index 6e9d4f9..0f817de 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,6 +29,12 @@
 			<id>eclipselink</id>
 			<url>http://maven.research-infrastructures.eu:8081/nexus/content/repositories/eclipselink/</url>
 		</repository>
+		<repository>
+			<id>Apache</id>
+			<name>Apache repository</name>
+			<url>https://repo1.maven.org/maven2</url>
+		</repository>
+
 	</repositories>
 
 	<properties>
diff --git a/src/main/java/org/gcube/portlets/user/workspace/server/util/MimeTypeUtility.java b/src/main/java/org/gcube/portlets/user/workspace/server/util/MimeTypeUtility.java
index 1d94814..8fcfd2b 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/server/util/MimeTypeUtility.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/server/util/MimeTypeUtility.java
@@ -17,9 +17,12 @@ import org.apache.commons.io.FilenameUtils;
 import org.apache.tika.config.TikaConfig;
 import org.apache.tika.detect.Detector;
 import org.apache.tika.io.TikaInputStream;
+import org.apache.tika.metadata.Metadata;
+import org.apache.tika.mime.MediaType;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+
 // TODO: Auto-generated Javadoc
 /**
  * The Class MimeTypeUtil.