HSQLDB connection flush: safer handling when createStatement or execute fails

Change-Id: I32f3014bbf32c4a4a990bea03ee565c9b4c0164d

connectivity/source/drivers/hsqldb/HConnection.cxx

@@ -150,12 +150,19 @@ namespace connectivity { namespace hsqldb
                             m_bReadOnly = true;
                     }
                 }
+                try
+                {
                     if ( !m_bReadOnly )
                     {
                         Reference< XStatement > xStmt( m_xConnection->createStatement(), UNO_QUERY_THROW );
                         xStmt->execute( OUString( "CHECKPOINT DEFRAG" ) );
                     }
                 }
+                catch(const Exception& )
+                {
+                    DBG_UNHANDLED_EXCEPTION();
+                }
+            }
 
             EventObject aFlushedEvent( *this );
             m_aFlushListeners.notifyEach( &XFlushListener::flushed, aFlushedEvent );