Use Liquibase, hsqldb and postgre

driver: org.postgresql.Driver
classpath: ./lib/postgresql-9.2-1002-jdbc4.jar
url: jdbc:postgresql://db-tools.localhost.squaretrade.com:5432/tools
username: ""
password: ""
changeLogFile: src/main/db/tools/public/changelog/main_tools_changelog.xml

and I also want to use HSQLDB for in memory database to run my tests.

I searched many of the topics here and also on internet but didn't get correct result.

Some are using only hsqldb with liquibase and some postgre.

I concern is, I want to dump my postgre database and add it to liquibase which I did, and then I want to use  hsqldb for in memory.

is it possible?

Thanks