Static fixes

Author: Vitaliy Boyko

src/com/magento/idea/magento2plugin/indexes/EventIndex.java

@@ -24,7 +24,7 @@ public class EventIndex {
     private final Project project;
 
     /**
-     * Gets singleton instance.
+     * Constructor.
      */
     public EventIndex(final Project project) {
         this.project = project;

src/com/magento/idea/magento2plugin/util/xml/XmlPsiTreeUtil.java

@@ -54,6 +54,9 @@ public static XmlTag getTypeTagOfArgument(final XmlElement psiArgumentValueEleme
     /**
      * Finds observer tags by event-observer name combination.
      */
+    @SuppressWarnings({
+            "PMD.CyclomaticComplexity"
+    })
     public static Collection<XmlAttributeValue> findObserverTags(
             final XmlFile xmlFile,
             final String eventName,