4.0.0 com.baeldung.multimodulemavenproject multimodulemavenproject 1.0 pom multimodulemavenproject maven-entitymodule maven-daomodule maven-userdaomodule maven-mainappmodule org.apache.maven.plugins maven-compiler-plugin ${compiler.plugin.version} ${source.version} ${target.version} 3.12.1 1.9 1.9