Data is not saving in MEMORY Table of HSQL
...the default, MEMORY tables are persistent.

CREATE MEMORY TABLE SESSIONS(
SESSION_DATE DATE NOT NULL,
IN_TIME TIMESTAMP NOT NULL,
OUT_TIME TIMESTAMP NOT NULL)

DriverManager.getConnection("jdbc:hsqldb:file:"+
                             DbConnection.class.getResource("/loginTimerDB").getPath()+"/loginTimerDB",
                             "SA",
                            "");

"jdbc:hsqldb:file:loginTimerDB/loginTimerDB"

connection.prepareStatement("SHUTDOWN").execute();

jdbc:hsqldb:file:loginTimerDB/loginTimerDB;shutdown=true