Fix compatibility issue with properties (#15)

src/main/java/com/resend/core/net/impl/HttpClient.java

@@ -4,7 +4,6 @@
 import com.resend.core.net.HttpMethod;
 import com.resend.core.net.IHttpClient;
 
-import com.resend.core.util.PropertiesReader;
 import okhttp3.*;
 
 import java.io.IOException;
@@ -18,21 +17,21 @@ public class HttpClient implements IHttpClient<Response> {
     /** The base URL for the API. */
     public static final String BASE_API = "https://api.resend.com";
 
+    /** The version of the API */
+    private static final String VERSION_NAME = "2.2.1";
+
     /** The User-Agent header value for HTTP requests. */
-    public static final String USER_AGENT = "resend-java/";
+    public static final String USER_AGENT = "resend-java/" + VERSION_NAME;
 
     /** The OkHttpClient instance for handling HTTP requests. */
     private final OkHttpClient httpClient;
 
-    private final PropertiesReader propertiesReader;
-
     /**
      * Constructs an instance of the HttpClient with the provided API key.
      *
      */
     public HttpClient() {
         this.httpClient = new OkHttpClient();
-        this.propertiesReader = new PropertiesReader();
     }
 
     /**
@@ -54,7 +53,7 @@ public AbstractHttpResponse perform(final String path, final String apiKey, fina
         Request request = new Request.Builder()
                 .url(BASE_API + path)
                 .addHeader("Accept", "application/json")
-                .addHeader("User-Agent", USER_AGENT + propertiesReader.retrieveProperty("VERSION_NAME"))
+                .addHeader("User-Agent", USER_AGENT)
                 .addHeader("Authorization", "Bearer " + apiKey)
                 .method(method.name(), requestBody)
                 .build();

src/main/java/com/resend/services/batch/Batch.java

@@ -11,6 +11,9 @@
 
 import java.util.List;
 
+/**
+ *  Represents the Resend Batch module.
+ */
 public class Batch extends BaseService {
     /**
      * Constructsan instance of the {@code Batch} class.
@@ -43,8 +46,16 @@ public CreateBatchEmailsResponse send(List<SendEmailRequest> emails) throws Rese
 
         return createBatchEmailsResponse;
     }
-
+
+    /**
+     * Creates and sends a batch of email messages based on the provided list of email requests.
+     *
+     * @param emails A list of {@link SendEmailRequest} objects representing the email messages to be sent.
+     * @return A {@link CreateBatchEmailsResponse} containing information about the created batch of emails.
+     * @throws ResendException if an error occurs during the creation and sending of the emails.
+     */
     public CreateBatchEmailsResponse create(List<SendEmailRequest> emails) throws ResendException {
         return this.send(emails);
     }
+
 }

src/main/java/com/resend/services/domains/model/Domain.java

@@ -28,6 +28,9 @@ public class Domain extends AbstractDomain {
     @JsonProperty("dnsProvider")
     private String dnsProvider;
 
+    /**
+     * Empty constructor.
+     */
     public Domain() {
 
     }

src/main/java/com/resend/services/domains/model/Record.java

@@ -28,7 +28,9 @@ public class Record {
     @JsonProperty("priority")
     private int priority;
 
-
+    /**
+     * Empty constructor.
+     */
     public Record() {
     }