Issue #2283: rename CheckUtils.isVoidMethod to isNonVoidMethod

Author: romani

src/main/java/com/puppycrawl/tools/checkstyle/checks/javadoc/JavadocMethodCheck.java

@@ -494,7 +494,7 @@ private void checkComment(DetailAST ast, TextBlock comment) {
 
             checkParamTags(tags, ast, !hasInheritDocTag);
             checkThrowsTags(tags, getThrows(ast), !hasInheritDocTag);
-            if (CheckUtils.isVoidMethod(ast)) {
+            if (CheckUtils.isNonVoidMethod(ast)) {
                 checkReturnTag(tags, ast.getLineNo(), !hasInheritDocTag);
             }
         }

src/main/java/com/puppycrawl/tools/checkstyle/utils/CheckUtils.java

@@ -400,7 +400,7 @@ public static boolean isGetterMethod(final DetailAST ast) {
      * @param methodDefAst the method node.
      * @return true if method is a void one.
      */
-    public static boolean isVoidMethod(DetailAST methodDefAst) {
+    public static boolean isNonVoidMethod(DetailAST methodDefAst) {
         boolean retVal = false;
         if (methodDefAst.getType() == TokenTypes.METHOD_DEF) {
             final DetailAST typeAST = methodDefAst.findFirstToken(TokenTypes.TYPE);