si scusa, intendevo eccezione... ma ho già provato con la try-catch e nn andava lo stesso!
Continua a darmi eccezioni:

org.h2.jdbc.JdbcSQLException: Table tabella1 already exists [42101-74]
at org.h2.message.Message.getSQLException(Message.jav a:103)
at org.h2.message.Message.getSQLException(Message.jav a:114)
at org.h2.message.Message.getSQLException(Message.jav a:77)
at org.h2.command.ddl.CreateTable.update(CreateTable. java:113)
at org.h2.command.CommandContainer.update(CommandCont ainer.java:69)
at org.h2.command.Command.executeUpdate(Command.java: 203)
at org.h2.jdbc.JdbcStatement.executeUpdate(JdbcStatem ent.java:117)
.............