package com.nilhcem.md2html.console;

/**
 * Thrown if the program arguments were invalid.
 *
 * @author Nilhcem
 * @since 1.0
 */
public final class DisplayUsageException extends Exception {
	private static final long serialVersionUID = -7009963711233684636L;

	/**
	 * Displays the program usage.
	 */
	@Override
	public String getMessage() {
		return "usage: java -jar Markdown2HTML.jar [markdownFile] [- header headerFile.html] [-footer footerFile.html] [-out [file.html]]";
	}
}

package com.nilhcem.md2html.console;

/**
 * Thrown if the program arguments were invalid.
 *
 * @author Nilhcem
 * @since 1.0
 */
public final class DisplayUsageException extends Exception {
	private static final long serialVersionUID = -7009963711233684636L;

	/**
	 * Displays the program usage.
	 */
	@Override
	public String getMessage() {
		return "usage: java -jar Markdown2HTML.jar [markdownFile] [- header headerFile.html] [-footer footerFile.html] [-out [file.html]]  [-d [directory]]";
	}
}

Update DisplayUsageException.java