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/DebugUtils.java

@@ -17,15 +17,13 @@
 package io.moquette.spi.impl;
 
 import io.netty.buffer.ByteBuf;
-import java.nio.ByteBuffer;
 
-/**
- *
- * @author andrea
- */
-class DebugUtils {
+final class DebugUtils {
 
     static String payload2Str(ByteBuf content) {
-        return new String(content.copy  ().array());
+        return new String(content.copy().array());
+    }
+
+    private DebugUtils() {
     }
 }