jesterpm-tetris org.eclipse.jdt.core.javabuilder net.sf.eclipsecs.core.CheckstyleBuilder edu.umd.cs.findbugs.plugin.eclipse.findbugsBuilder net.sourceforge.pmd.eclipse.plugin.pmdBuilder net.sourceforge.metrics.builder ie.ucd.autograder.builder org.eclipse.jdt.core.javanature edu.umd.cs.findbugs.plugin.eclipse.findbugsNature net.sourceforge.pmd.eclipse.plugin.pmdNature net.sourceforge.metrics.nature net.sf.eclipsecs.core.CheckstyleNature ie.ucd.autograder.nature