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diff --git a/org.jacoco.cli/src/org/jacoco/cli/internal/Command.java b/org.jacoco.cli/src/org/jacoco/cli/internal/Command.java
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+++ b/org.jacoco.cli/src/org/jacoco/cli/internal/Command.java
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+/*******************************************************************************
+ * Copyright (c) 2009, 2017 Mountainminds GmbH & Co. KG and Contributors
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Marc R. Hoffmann - initial API and implementation
+ *
+ *******************************************************************************/
+package org.jacoco.cli.internal;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+import org.kohsuke.args4j.Option;
+
+/**
+ * Common interface for all commands.
+ */
+public abstract class Command {
+
+	/**
+	 * Common command line prefix.
+	 */
+	public static final String JAVACMD = "java -jar jacococli.jar ";
+
+	/**
+	 * Flag whether help should be printed for this command.
+	 */
+	@Option(name = "-help", usage = "show help", help = true)
+	public boolean help = false;
+
+	/**
+	 * @return Short description of the command.
+	 */
+	public abstract String description();
+
+	/**
+	 * @return name of the command
+	 */
+	public String name() {
+		return getClass().getSimpleName().toLowerCase();
+	}
+
+	/**
+	 * @param parser
+	 *            parser for this command
+	 * @return usage string displayed for help
+	 */
+	public String usage(final CommandParser parser) {
+		final StringWriter writer = new StringWriter();
+		parser.printSingleLineUsage(writer, null);
+		return JAVACMD + name() + writer;
+	}
+
+	/**
+	 * Executes the given command.
+	 * 
+	 * @param out
+	 *            std out
+	 * @param err
+	 *            std err
+	 * @return exit code, should be 0 for normal operation
+	 * @throws Exception
+	 *             any exception that my occur during execution
+	 */
+	public abstract int execute(PrintWriter out, PrintWriter err)
+			throws Exception;
+
+	/**
+	 * Prints textual help for this command.
+	 * 
+	 * @param writer
+	 *            output destination
+	 */
+	protected void printHelp(final PrintWriter writer) {
+		final CommandParser parser = new CommandParser(this);
+		writer.println("Usage: " + parser.getCommand().usage(parser));
+		writer.println(description());
+		parser.printUsage(writer, null);
+	}
+
+}