Manipulating data depending on ran changesets

final Database database = DatabaseFactory.getInstance().findCorrectDatabaseImplementation(new JdbcConnection(this.connection));
Liquibase liquibase = new Liquibase("myFirstChangeLog.xml", new ClassLoaderResourceAccessor(CsgApp.class.getClassLoader()), database);
liquibase.update("");
liquibase = new Liquibase(mySecondChangeLog.xml", new ClassLoaderResourceAccessor(CsgApp.class.getClassLoader()), database);
// changeExecListener
liquibase.update("");

I tried to use changeExecListener:

liquibase.setChangeExecListener(new ChangeExecListener() {

            @Override
            public void willRun(ChangeSet changeSet, DatabaseChangeLog databaseChangeLog, Database database, RunStatus runStatus) {
                System.out.println("Will run changeset 2");
            }

            @Override
            public void rolledBack(ChangeSet changeSet, DatabaseChangeLog databaseChangeLog, Database database) {
                // not used
            }

            @Override
            public void ran(ChangeSet changeSet, DatabaseChangeLog databaseChangeLog, Database database, ExecType execType) {
                System.out.println("Ran changeset 2");
            }
        });

but that wont work. Am I on the wrong way? How can I solve this problem?