I am using HSQLDB

Here is what I see in logs

107618 DEBUG AbstractBatcher - preparing statement
107619 DEBUG IdentifierGeneratorFactory - Natively generated identity: 0
107619 DEBUG AbstractBatcher - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
107619 DEBUG AbstractBatcher - closing statement
107620 DEBUG ConnectionManager -
107620 DEBUG ConnectionManager - releasing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
107620 DEBUG DriverManagerConnectionProvider - closing JDBC connection
107639 DEBUG HibernateTemplate - Eagerly flushing Hibernate session
107639 DEBUG AbstractFlushingEventListener - flushing session
107642 DEBUG AbstractFlushingEventListener - processing flush-time cascades
107644 DEBUG AbstractFlushingEventListener - dirty checking collections
107644 DEBUG AbstractFlushingEventListener - Flushing entities and processing referenced collections
107653 DEBUG AbstractFlushingEventListener - Processing unreferenced collections
107653 DEBUG AbstractFlushingEventListener - Scheduling collection removes/(re)creates/updates
107653 DEBUG AbstractFlushingEventListener - Flushed: 0 insertions, 0 updates, 0 deletions to 1 objects
107653 DEBUG AbstractFlushingEventListener - Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
107656 DEBUG Printer - listing entities:
107657 DEBUG Printer - com.timetrial.model.Person{id=0, lastName=null, isOrganizer=null, creationDate=null, userName=sachiechan, isRider=null, firstName=null, modifiedDate=null}
107657 DEBUG AbstractFlushingEventListener - executing flush
107657 DEBUG ConnectionManager - registering flush begin
107657 DEBUG ConnectionManager - registering flush end
107657 DEBUG ConnectionManager - aggressively releasing JDBC connection
107658 DEBUG AbstractFlushingEventListener - post flush
107658 DEBUG SessionFactoryUtils - Closing Hibernate Session
107658 DEBUG SessionImpl - closing session
107658 DEBUG ConnectionManager - connection already null in cleanup : no action

Is it evident from this trace as to why no data is being saved in the db?