Resolved checkstyle issues

acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/Hayes.java

@@ -38,9 +38,9 @@ public class Hayes extends Modem {
   @Override
   public void accept(ModemVisitor modemVisitor) {
     if (modemVisitor instanceof HayesVisitor) {
-        ((HayesVisitor) modemVisitor).visit(this);
+      ((HayesVisitor) modemVisitor).visit(this);
     } else {
-        LOGGER.info("Only HayesVisitor is allowed to visit Hayes modem");
+      LOGGER.info("Only HayesVisitor is allowed to visit Hayes modem");
     }
 
   }

acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/Zoom.java

@@ -38,7 +38,7 @@ public class Zoom extends Modem {
   @Override
   public void accept(ModemVisitor modemVisitor) {
     if (modemVisitor instanceof  ZoomVisitor) {
-        ((ZoomVisitor) modemVisitor).visit(this);
+      ((ZoomVisitor) modemVisitor).visit(this);
     } else {
       LOGGER.info("Only ZoomVisitor is allowed to visit Zoom modem");
     }