diff --git a/src/main/java/org/gcube/gcat/oldutils/Validator.java b/src/main/java/org/gcube/gcat/oldutils/Validator.java
index 360a1fc..2d37778 100644
--- a/src/main/java/org/gcube/gcat/oldutils/Validator.java
+++ b/src/main/java/org/gcube/gcat/oldutils/Validator.java
@@ -229,9 +229,6 @@ public class Validator {
 	
 	/**
 	 * Retrieve an instance of the library for the scope
-	 * @param scope if it is null it is evaluated from the session
-	 * @return
-	 * @throws Exception 
 	 */
 	public void createGroupAsSysAdmin(String title) throws Exception {
 		String sysAdminAPI = CKANUtility.getSysAdminAPI();
@@ -606,8 +603,6 @@ public class Validator {
 	/**
 	 * Get the group hierarchy
 	 * @param groupName
-	 * @param isApplication 
-	 * @return
 	 * @throws Exception 
 	 */
 	public static List<String> getGroupHierarchyNames(String groupName) throws Exception {
diff --git a/src/main/java/org/gcube/gcat/persistence/ckan/CKAN.java b/src/main/java/org/gcube/gcat/persistence/ckan/CKAN.java
index 5b7cc1e..9bd85c4 100644
--- a/src/main/java/org/gcube/gcat/persistence/ckan/CKAN.java
+++ b/src/main/java/org/gcube/gcat/persistence/ckan/CKAN.java
@@ -132,7 +132,7 @@ public abstract class CKAN {
 	/**
 	 * Validate the CKAN response and return the 
 	 * @param json
-	 * @return
+	 * @return the validated response as JsonNode
 	 */
 	protected JsonNode validateCKANResponse(String json) {
 		JsonNode jsonNode = getAsJsonNode(json);
diff --git a/src/main/java/org/gcube/gcat/profile/MetadataUtility.java b/src/main/java/org/gcube/gcat/profile/MetadataUtility.java
index ed14931..eb7bbdd 100644
--- a/src/main/java/org/gcube/gcat/profile/MetadataUtility.java
+++ b/src/main/java/org/gcube/gcat/profile/MetadataUtility.java
@@ -45,7 +45,7 @@ public class MetadataUtility {
 	/**
 	 * Returns the names of the metadata profiles in a given context
 	 * @param context
-	 * @return
+	 * @return the set of profile names
 	 * @throws Exception 
 	 */
 	public Set<String> getProfilesNames() throws Exception {