docs: javadocs adjustments

src/main/java/cl/transbank/common/IntegrationTypeHelper.java

@@ -7,6 +7,8 @@ public class IntegrationTypeHelper {
 
   /**
    * Returns the Webpay integration type based on the provided integration type.
+   * @param integrationType The integration type.
+   * @return The Webpay integration URL.
    */
   public static String getWebpayIntegrationType(
     IntegrationType integrationType
@@ -27,6 +29,8 @@ public static String getWebpayIntegrationType(
 
   /**
    * Returns the Patpass integration type based on the provided integration type.
+   * @param integrationType The integration type.
+   * @return The Patpass integration URL.
    */
   public static String getPatpassIntegrationType(
     IntegrationType integrationType

src/main/java/cl/transbank/exception/TransbankException.java

@@ -27,6 +27,8 @@ public TransbankException(String message) {
 
   /**
    * Constructs a new TransbankException with the specified detail message and error code.
+   * @param code The error code.
+   * @param message The detail message.
    */
   public TransbankException(int code, String message) {
     super(message);
@@ -35,6 +37,8 @@ public TransbankException(int code, String message) {
 
   /**
    * Constructs a new TransbankException with the specified detail message, error code, and cause.
+   * @param code The error code.
+   * @param message The detail message.
    */
   public TransbankException(int code, String message, Throwable cause) {
     super(message, cause);
@@ -43,13 +47,16 @@ public TransbankException(int code, String message, Throwable cause) {
 
   /**
    * Constructs a new TransbankException with the specified cause.
+   * @param cause The cause.
    */
   public TransbankException(Throwable cause) {
     super(cause);
   }
 
   /**
    * Constructs a new TransbankException with the specified Ccode and cause.
+   * @param code The error code.
+   * @param cause The cause.
    */
   public TransbankException(int code, Throwable cause) {
     super(cause);
@@ -58,6 +65,11 @@ public TransbankException(int code, Throwable cause) {
 
   /**
    * Constructs a new TransbankException with the specified error code and cause.
+   * @param code The error code.
+   * @param message The detail message.
+   * @param cause The cause.
+   * @param enableSuppression Whether or not suppression is enabled or disabled.
+   * @param writableStackTrace Whether or not the stack trace should be writable.
    */
   public TransbankException(
     int code,

src/main/java/cl/transbank/util/HttpUtilImpl.java

@@ -361,6 +361,7 @@ private HttpUtilImpl() {
   /**
    * Returns the singleton instance of HttpUtilImpl.
    * If the instance does not exist, it is created.
+   * @return The singleton instance of HttpUtilImpl.
    */
   public static HttpUtilImpl getInstance() {
     if (null == instance) synchronized (HttpUtilImpl.class) {

src/main/java/cl/transbank/util/WebpayApiResource.java

@@ -49,6 +49,7 @@ public static Map<String, String> buildHeaders(Options options) {
    * @param options The options for the request.
    * @param clazz The class of the response.
    * @return The response to the request.
+   * @throws TransbankException If an error occurs during the request.
    */
   public static <T> T execute(
     final String endpoint,
@@ -66,6 +67,7 @@ public static <T> T execute(
    * @param request The request body.
    * @param options The options for the request.
    * @return The response to the request.
+   * @throws TransbankException If an error occurs during the request.
    */
   public static <T> T execute(
     final String endpoint,
@@ -84,6 +86,7 @@ public static <T> T execute(
    * @param options The options for the request.
    * @param clazz The class of the response.
    * @return The response to the request.
+   * @throws TransbankException If an error occurs during the request.
    */
   public static <T> T execute(
     final String endpoint,
@@ -130,6 +133,7 @@ public static <T> T execute(
    * @param options The options for the request.
    * @param clazz The class of the response.
    * @return A list of responses to the request.
+   * @throws TransbankException If an error occurs during the request.
    */
   public static <T> List<T> executeToList(
     final String endpoint,
@@ -148,6 +152,7 @@ public static <T> List<T> executeToList(
    * @param options The options for the request.
    * @param clazz The class of the response.
    * @return A list of responses to the request.
+   * @throws TransbankException If an error occurs during the request.
    */
   public static <T> List<T> executeToList(
     final String endpoint,