Tidying.

Remove pointless super() calls.
Remove redundant interface decs.
Remove unnecessary enum annotations.
Change .length == 0 to .isEmpty.

Change-Id: I80c52ef8c39d9fc45038921285dd85bba6b397d4
Reviewed-on: http://gerrit.dmdirc.com/3843
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

src/com/dmdirc/util/io/Downloader.java

 
         urlConn.setUseCaches(false);
         urlConn.setDoInput(true);
-        urlConn.setDoOutput(postData.length() > 0);
+        urlConn.setDoOutput(!postData.isEmpty());
         urlConn.setConnectTimeout(10000);
 
-        if (postData.length() > 0) {
+        if (!postData.isEmpty()) {
             urlConn.setRequestProperty("Content-Type",
                     "application/x-www-form-urlencoded");
 

src/com/dmdirc/util/io/StreamUtils.java

 
     /** Shouldn't be called. */
     private StreamUtils() {
-        super();
     }
 
     /**

src/com/dmdirc/util/validators/ColourValidator.java

  *
  * @since 0.6.5
  */
-public class ColourValidator extends RegexStringValidator implements
-        Validator<String> {
+public class ColourValidator extends RegexStringValidator {
 
     /**
      * Creates a new colour validator.