diff --git a/src/main/java/org/gcube/application/geoportal/model/content/PersistedContent.java b/src/main/java/org/gcube/application/geoportal/model/content/PersistedContent.java
index d8164da..05cd0dc 100644
--- a/src/main/java/org/gcube/application/geoportal/model/content/PersistedContent.java
+++ b/src/main/java/org/gcube/application/geoportal/model/content/PersistedContent.java
@@ -39,8 +39,8 @@ public abstract class PersistedContent {
 		builder.append("PersistedContent [id=");
 		builder.append(id);
 		if(associated==null) {
-		builder.append(", associated=");
-		builder.append(associated);
+			builder.append(", associated=");
+			builder.append(associated);
 		}else {
 			builder.append(", OWNER-associated-id=");
 			builder.append(associated.getId());
diff --git a/src/main/resources/META-INF/persistence.xml b/src/main/resources/META-INF/persistence.xml
new file mode 100644
index 0000000..fc45f4a
--- /dev/null
+++ b/src/main/resources/META-INF/persistence.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence"  
+xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
+<persistence-unit name="gna_internal_db" transaction-type="RESOURCE_LOCAL">
+   
+   <class>org.gcube.application.geoportal.model.Record</class>
+   <!-- Concessioni -->
+   	<class>org.gcube.application.geoportal.model.concessioni.Concessione</class>
+	<class>org.gcube.application.geoportal.model.concessioni.LayerConcessione</class>
+	<class>org.gcube.application.geoportal.model.concessioni.RelazioneScavo</class>
+
+   <!-- Content -->
+    <class>org.gcube.application.geoportal.model.content.AssociatedContent</class>
+    <class>org.gcube.application.geoportal.model.content.GeoServerContent</class>
+    <class>org.gcube.application.geoportal.model.content.OtherContent</class>
+    <class>org.gcube.application.geoportal.model.content.PersistedContent</class>
+    <class>org.gcube.application.geoportal.model.content.UploadedImage</class>
+    <class>org.gcube.application.geoportal.model.content.WorkspaceContent</class>
+    
+   <!-- GIS --> 
+    <class>org.gcube.application.geoportal.model.gis.ShapeFileLayerDescriptor</class>
+    <class>org.gcube.application.geoportal.model.gis.SDILayerDescriptor</class>
+    
+    
+</persistence-unit>
+</persistence>
\ No newline at end of file