Fixed mistake where document doesn't actually have the created body or head in WebPage.java

Reviewed-on: #1

README.MD

@@ -23,5 +23,3 @@ Download all license here: https://open-autonomous-connection.org/assets/license
 # In progress
 
 # TODO
-
-everything

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>org.openautonomousconnection</groupId>
     <artifactId>WebServer</artifactId>
-    <version>1.0.1-BETA.0.4</version>
+    <version>1.0.1-BETA.0.5</version>
     <organization>
         <name>Open Autonomous Connection</name>
         <url>https://open-autonomous-connection.org/</url>

src/main/java/org/openautonomousconnection/webserver/api/WebPage.java

@@ -1,13 +1,54 @@
 package org.openautonomousconnection.webserver.api;
 
 import org.openautonomousconnection.protocol.packets.v1_0_1.beta.web.impl.resource.WebResourceResponsePacket;
+import org.openautonomousconnection.webserver.Main;
+import org.w3c.dom.Document;
+import org.w3c.dom.html.HTMLBodyElement;
+import org.w3c.dom.html.HTMLHeadElement;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
 
 /**
  * Server-side Java page (v1.0.1-BETA).
  *
- * <p>Every .java page must implement this interface.</p>
+ * <p>Every .java page must extend this class.</p>
  */
-public interface WebPage {
+public abstract class WebPage {
+
+    private static final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+
+    private static final DocumentBuilder documentBuilder;
+
+    static {
+        DocumentBuilder temp = null;
+        try {
+            temp = factory.newDocumentBuilder();
+        } catch (ParserConfigurationException e) {
+            Main.getValues().logger.exception("Failed to create document builder", e);
+            temp = null;
+        }
+
+        documentBuilder = temp;
+    }
+
+    protected final Document document;
+    protected final HTMLHeadElement head;
+    protected final HTMLBodyElement body;
+
+    /**
+     * Default constructor that creates a new Document instance
+     */
+    public WebPage() {
+        this.document = documentBuilder.newDocument();
+
+        this.head = (HTMLHeadElement) this.document.createElement("head");
+        this.body = (HTMLBodyElement) this.document.createElement("body");
+
+        this.document.appendChild(this.head);
+        this.document.appendChild(this.body);
+    }
 
     /**
      * Handles a web request.
@@ -16,5 +57,5 @@ public interface WebPage {
      * @return resource response packet
      * @throws Exception on unexpected failures
      */
-    WebResourceResponsePacket handle(WebPageContext ctx) throws Exception;
+    public abstract WebResourceResponsePacket handle(WebPageContext ctx) throws Exception;
 }