diff --git a/src/main/java/org/gcube/accounting/persistence/AccountingPersistence.java b/src/main/java/org/gcube/accounting/persistence/AccountingPersistence.java
index 37d8af0..b7e8f3e 100644
--- a/src/main/java/org/gcube/accounting/persistence/AccountingPersistence.java
+++ b/src/main/java/org/gcube/accounting/persistence/AccountingPersistence.java
@@ -20,6 +20,9 @@ public abstract class AccountingPersistence {
 	protected FallbackPersistence fallback;
 	protected AggregationScheduler aggregationScheduler;
 	
+	protected AccountingPersistence(){
+		
+	}
 	
 	protected AccountingPersistence(FallbackPersistence fallback, AggregationScheduler aggregationScheduler){
 		this.fallback = fallback;
@@ -49,18 +52,6 @@ public abstract class AccountingPersistence {
 	 */
 	protected abstract void prepareConnection(AccountingPersistenceConfiguration configuration) throws Exception;
 	
-	/* *
-	 * Prepare the connection and try to write a test record on default 
-	 * persistence and fallback persistence.
-	 * This method should not be re-implemented from subclass.
-	 * @throws Exception if fails
-	 * /
-	public void connect() throws Exception {
-		persistence.prepareConnection();
-		persistence.account(createTestUsageRecord());
-	}
-	*/
-	
 	/**
 	 * This method contains the code to save the {@link #UsageRecord}
 	 *