JNI/JSSE: clean up ant build warnings for Corretto 20.0.1

src/java/com/wolfssl/WolfSSL.java

@@ -725,6 +725,9 @@ public static void loadLibraryAbsolute(String libPath)
      * @param file File to read into byte array
      *
      * @return byte array representing input File, or null if file is null
+     *
+     * @throws FileNotFoundException if input file is not found
+     * @throws IOException if unable to read entire file
      */
     protected static byte[] fileToBytes(File file)
         throws FileNotFoundException, IOException {

src/java/com/wolfssl/provider/jsse/WolfSSLDebug.java

@@ -58,6 +58,12 @@ public class WolfSSLDebug {
      */
     private static WolfSSLNativeLoggingCallback nativeLogCb = null;
 
+    /**
+     * Default constructor for wolfJSSE debug class.
+     */
+    public WolfSSLDebug() {
+    }
+
     private static boolean checkProperty() {
 
         String enabled = System.getProperty("wolfjsse.debug");

src/java/com/wolfssl/provider/jsse/WolfSSLEngineHelper.java

@@ -1408,6 +1408,9 @@ protected synchronized int saveSession() {
         return WolfSSL.SSL_FAILURE;
     }
 
+    /**
+     * Clear internal state of this WolfSSLEngineHelper.
+     */
     protected synchronized void clearObjectState() {
         this.ssl = null;
         this.session = null;

src/java/com/wolfssl/provider/jsse/WolfSSLImplementSSLSession.java

@@ -831,6 +831,9 @@ protected synchronized void setResume() {
         }
     }
 
+    /**
+     * Update internally-stored session values.
+     */
     protected synchronized void updateStoredSessionValues() {
 
         try {

src/java/com/wolfssl/provider/jsse/WolfSSLUtil.java

@@ -42,6 +42,12 @@
  */
 public class WolfSSLUtil {
 
+    /**
+     * Default constructor for WolfSSLUtil class.
+     */
+    public WolfSSLUtil() {
+    }
+
     /**
      * Sanitize or filter protocol list based on system property limitations.
      *