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/spi/impl/subscriptions/Subscription.java

@@ -22,9 +22,6 @@ import java.io.Serializable;
 
 /**
  * Maintain the information about which Topic a certain ClientID is subscribed and at which QoS
- *
- *
- * @author andrea
  */
 public final class Subscription implements Serializable {
 

broker/src/main/java/io/moquette/spi/impl/subscriptions/SubscriptionsStore.java

@@ -26,8 +26,6 @@ import java.util.concurrent.atomic.AtomicReference;
 
 /**
  * Represents a tree of topics subscriptions.
- *
- * @author andrea
  */
 public class SubscriptionsStore {
 
@@ -125,7 +123,7 @@ public class SubscriptionsStore {
             couple.createdNode.addSubscription(newSubscription); //createdNode could be null?
             couple.root.recalculateSubscriptionsSize();
             //spin lock repeating till we can, swap root, if can't swap just re-do the operation
-        } while(!subscriptions.compareAndSet(oldRoot, couple.root));
+        } while (!subscriptions.compareAndSet(oldRoot, couple.root));
         LOG.debug("A subscription has been added. Root = {}, oldRoot = {}.", couple.root, oldRoot);
     }
 
@@ -168,7 +166,7 @@ public class SubscriptionsStore {
             couple.createdNode.remove(new ClientTopicCouple(clientID, topic));
             couple.root.recalculateSubscriptionsSize();
             //spin lock repeating till we can, swap root, if can't swap just re-do the operation
-        } while(!subscriptions.compareAndSet(oldRoot, couple.root));
+        } while (!subscriptions.compareAndSet(oldRoot, couple.root));
     }
 
     /**

broker/src/main/java/io/moquette/spi/impl/subscriptions/TreeNode.java

@@ -26,7 +26,7 @@ class TreeNode {
     List<TreeNode> m_children = new ArrayList<>();
     Set<ClientTopicCouple> m_subscriptions = new HashSet<>();
 
-    private int subtreeSubscriptions = 0;
+    private int subtreeSubscriptions;
 
     TreeNode() {
     }