editorconfig: max line length set

max line length warnings removed
missing Copyright added
useless publics removed
unmaintainable Javadoc tags: @author removed
helper class warnings removed
field default value initialization removed
Multiple warnings removed
pref: checkstyle warnings removed
Checkstyle will fail the build process if it detects violations
switch default cases error logger added

broker/src/main/java/io/moquette/server/Constants.java

@@ -19,10 +19,13 @@ package io.moquette.server;
 /**
  * Server constants keeper
  */
-public class Constants {
+public final class Constants {
 
     public static final String ATTR_CLIENTID = "ClientID";
     public static final String CLEAN_SESSION = "cleanSession";
     public static final String KEEP_ALIVE = "keepAlive";
     public static final int MAX_MESSAGE_QUEUE = 1024; // number of messages
+
+    private Constants() {
+    }
 }