common/src/main/java/org/jboss/pnc/common/util/StringUtils.java
public static String addEndingSlash(String string) {
        if (string == null) {
            return null;
        }
        if (!string.endsWith("/")) {
            string += "/";
        }
        return string;
    }
public static String addEndingSlash(String string) {
        if (string == null) {
            return null;
        }
        if (!string.endsWith("/")) {
            string += "/";
        }
        return string;
    }
public static String addEndingSlash ( String string ) { if ( string == null ) { return null ; } if ( ! string . endsWith ( "/" ) ) { string += "/" ; } return string ; }
Adds ending slash if it is not present.

@param string
@return
Adds ending slash if it is not present .