Add 'Main-Class' to rngconverter JAR file manifest The maven-jar-plugin configuration in rngconverter/pom.xml had the intention of creating a runnable JAR file, but was not working due to an incorrect organization of the XML elements. In particular: + the '<manifest>' elt needed to be within the '<archive>' elt + the '<addClasspath>' elt needed to be within the '<manifest>' elt.