code: public static String ensureRight(final String value, final String suffix) {
          return ensureRight(value, suffix, true);
      }
docs: Ensures that the value ends with suffix. If it doesn't, it's appended. This operation is case sensitive.
  
  @param value  The input String
  @param suffix The substr to be ensured to be right
  @return The string which is guarenteed to start with substr