diff --git a/src/main/java/org/codelibs/fess/helper/QueryHelper.java b/src/main/java/org/codelibs/fess/helper/QueryHelper.java
index 7b20827ea..528d85f35 100644
--- a/src/main/java/org/codelibs/fess/helper/QueryHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/QueryHelper.java
@@ -736,8 +736,8 @@ public class QueryHelper {
     /**
      * @param sortFields the sortFields to set
      */
-    public void setSortFields(final String[] supportedSortFields) {
-        this.sortFields = supportedSortFields;
+    public void setSortFields(final String[] sortFields) {
+        this.sortFields = sortFields;
     }
 
     public void addHighlightField(final String field) {
diff --git a/src/main/java/org/codelibs/fess/job/ScheduledJobException.java b/src/main/java/org/codelibs/fess/job/ScheduledJobException.java
index 03db89a66..b0b441d31 100644
--- a/src/main/java/org/codelibs/fess/job/ScheduledJobException.java
+++ b/src/main/java/org/codelibs/fess/job/ScheduledJobException.java
@@ -22,8 +22,8 @@ public class ScheduledJobException extends FessSystemException {
     private static final long serialVersionUID = 1L;
 
     /**
-     * @param message
-     * @param cause
+     * @param message Exception message.
+     * @param cause Root cause for this exception.
      */
     public ScheduledJobException(final String message, final Throwable cause) {
         super(message, cause);
@@ -31,7 +31,7 @@ public class ScheduledJobException extends FessSystemException {
     }
 
     /**
-     * @param message
+     * @param message Exception message.
      */
     public ScheduledJobException(final String message) {
         super(message);
diff --git a/src/main/java/org/codelibs/fess/util/ComponentUtil.java b/src/main/java/org/codelibs/fess/util/ComponentUtil.java
index b40e55661..7c9680641 100644
--- a/src/main/java/org/codelibs/fess/util/ComponentUtil.java
+++ b/src/main/java/org/codelibs/fess/util/ComponentUtil.java
@@ -420,7 +420,7 @@ public final class ComponentUtil {
     /**
      * For test purpose only.
      * 
-     * @param fessConfig
+     * @param fessConfig fessConfig instance
      */
     public static void setFessConfig(final FessConfig fessConfig) {
         ComponentUtil.fessConfig = fessConfig;
diff --git a/src/main/java/org/codelibs/fess/util/KuromojiCSVUtil.java b/src/main/java/org/codelibs/fess/util/KuromojiCSVUtil.java
index 6dfda81c1..c43f56695 100644
--- a/src/main/java/org/codelibs/fess/util/KuromojiCSVUtil.java
+++ b/src/main/java/org/codelibs/fess/util/KuromojiCSVUtil.java
@@ -114,6 +114,9 @@ public final class KuromojiCSVUtil {
 
     /**
      * Quote and escape input value for CSV
+     * 
+     * @param original Original text.
+     * @return Escaped text.
      */
     public static String quoteEscape(final String original) {
         String result = original;