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db.changelog-1.0.3.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-2.0.xsd">
    <changeSet author="oc_aslak" id="25-some-demand-from-userstory-twentyfive">
        <addColumn tableName="some_table">
            <column name="accepted_something" type="BOOLEAN" defaultValueBoolean="true"/>
        </addColumn>
    </changeSet>
</databaseChangeLog>

db.changelog-master.xml

<?xml version="1.0" encoding="UTF-8"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-2.0.xsd">
    <include file="example/database/db.changelog-1.0.1.xml"/>
    <include file="example/database/db.changelog-1.0.2.xml"/>
    <include file="example/database/db.changelog-1.0.3.xml"/>
</databaseChangeLog>

Main.java

package example.database;

import liquibase.exception.CommandLineParsingException;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) throws CommandLineParsingException, IOException, NoSuchFieldException, IllegalAccessException {
        List<String> defaultArgs = Arrays.asList(
                "--driver=com.mysql.jdbc.Driver",
                "--url=jdbc:mysql://localhost/databaseName",
                "--username=defaultUsername",
                "--password=defaultPassword",
                "--changeLogFile=example/database/db.changelog-master.xml"
        );
        List<String> suppliedArgs = Arrays.asList(args);
        List<String> liquibaseArgs = new ArrayList<String>();

        liquibaseArgs.addAll(defaultArgs);
        liquibaseArgs.addAll(suppliedArgs);

        liquibase.integration.commandline.Main.main(liquibaseArgs.toArray(new String[liquibaseArgs.size()]));
    }
}

MANIFEST.MF

Manifest-Version: 1.0
Created-By: oc
Main-Class: example.database.Main
Liquibase-Package: liquibase.change,liquibase.database,liquibase.parser,liquibase.precondition,liquibase.serializer,liquibase.sqlgenerator,liquibase.executor,liquibase.snapshot,liquibase.logging,liquibase.ext

pom.xml

...
   <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <descriptorId>jar-with-dependencies</descriptorId>
                    <archive>
                        <manifestFile>
                            src/main/resources/META-INF/MANIFEST.MF
                        </manifestFile>
                    </archive>
                </configuration>
                <executions>
                    <execution>
                        <id>build</id>
                        <phase>package</phase>
                        <goals>
                            <goal>assembly</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
...