mvn com.github.dcrissman:pom-generator:generate -DgroupId=test -DartifactId=test -Dversion=1.0.0 -Ddependencies=groupId=g1:artifactId=a1:version=5,groupId=g2:artifactId=a2:version=3.2.1

Will produce:

<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<groupId>test</groupId>
<artifactId>test</artifactId>
<version>1.0.0</version>
<name>test</name>
<dependencies>
<dependency>
<groupId>g1</groupId>
<artifactId>a1</artifactId>
<version>5</version>
</dependency>
<dependency>
<groupId>g2</groupId>
<artifactId>a2</artifactId>
<version>3.2.1</version>
</dependency>
</dependencies>
</project>