diff --git a/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/Tokenizer.java b/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/Tokenizer.java
index 4122fa8..dc7afbd 100644
--- a/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/Tokenizer.java
+++ b/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/Tokenizer.java
@@ -91,7 +91,7 @@
      * @author Shohei Yamagiwa
      * @since 0.1
      */
-    protected final ArrayList<Token> splitBySpace(ArrayList<Token> original) {
+    protected static ArrayList<Token> splitBySpace(ArrayList<Token> original) {
         ArrayList<Token> newTokens = new ArrayList<>();
 
         original.forEach(originalToken -> {
@@ -133,7 +133,7 @@
      * @author Shohei Yamagiwa
      * @since 0.1
      */
-    protected final ArrayList<Token> extractMultilineComments(ArrayList<Token> original) {
+    protected static ArrayList<Token> extractMultilineComments(ArrayList<Token> original) {
         ArrayList<Token> newTokens = new ArrayList<>();
 
         Token commentToken = new Token();
@@ -179,7 +179,7 @@
      * @author Shohei Yamagiwa
      * @since 0.1
      */
-    protected final ArrayList<Token> extractComments(ArrayList<Token> original) {
+    protected static ArrayList<Token> extractComments(ArrayList<Token> original) {
         ArrayList<Token> newTokens = new ArrayList<>();
 
         int commentLine = -1;
@@ -233,16 +233,6 @@
                 continue;
             }
 
-            /**
-             * [token0, token1] => token0( token1
-             * ["", token0] => ""( token0
-             * [token0, ""] => token0( ""
-             * [token0, token1, token2] => token0( token1( token2
-             * [token0, "", token1] => token0( ""( token1
-             * ["", token0, token1] => ( token0( token1
-             * [token0, token1, ""] => token0( token1( ""
-             */
-
             /* Split into several tokens */
             String[] tokens = originalToken.getText().split(symbolRegex, -1);
             ArrayList<Token> splitTokens = new ArrayList<>();