Example

<liquibase-diff
  jar="/usr/local/lib/liquibase/liquibase.jar"
  classpathref="/usr/local/lib/liquibase/lib/mysql-connector-java-5.1.15-bin.jar"
  changelogFile="./changelogTest.xml"
  username="liquibase"
  password="liquibase"
  url="jdbc:mysql://localhost/mydatabase"
  referenceUsername="liquibase"
  referencePassword="liquibase"
  referenceUrl="jdbc:mysql://localhost/refdatabase"
/>