diff --git a/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/ansiblebridge/AnsibleBridge.java b/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/ansiblebridge/AnsibleBridge.java
index 2d9331f..64e7a46 100644
--- a/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/ansiblebridge/AnsibleBridge.java
+++ b/src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/ansiblebridge/AnsibleBridge.java
@@ -285,6 +285,7 @@ public class AnsibleBridge {
   /**
    * Generate all roles for this dependency
    * @param dep Dependency
+   * @return Collection of Roles
    */
   public Collection<Role> generateRoles(Dependency dep) {
     Collection<Role> roles = new Vector<>();