Correct javadoc and add @willclose annotations

Co-authored-by: Jan Artysiewicz <jan.artysiewicz@cronn.de>

src/main/java/org/jsoup/Jsoup.java

@@ -8,6 +8,8 @@
 import org.jsoup.safety.Safelist;
 
 import javax.annotation.Nullable;
+import javax.annotation.WillClose;
+
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
@@ -185,15 +187,15 @@ public static Document parse(File file, @Nullable String charsetName, String bas
      /**
      Read an input stream, and parse it to a Document.
 
-     @param in          input stream to read. Make sure to close it after parsing.
+     @param in          input stream to read. The stream will be closed after reading.
      @param charsetName (optional) character set of file contents. Set to {@code null} to determine from {@code http-equiv} meta tag, if
      present, or fall back to {@code UTF-8} (which is often safe to do).
      @param baseUri     The URL where the HTML was retrieved from, to resolve relative links against.
      @return sane HTML
 
      @throws IOException if the file could not be found, or read, or if the charsetName is invalid.
      */
-    public static Document parse(InputStream in, @Nullable String charsetName, String baseUri) throws IOException {
+    public static Document parse(@WillClose InputStream in, @Nullable String charsetName, String baseUri) throws IOException {
         return DataUtil.load(in, charsetName, baseUri);
     }
 

src/main/java/org/jsoup/helper/DataUtil.java

@@ -13,6 +13,8 @@
 import org.jsoup.select.Elements;
 
 import javax.annotation.Nullable;
+import javax.annotation.WillClose;
+
 import java.io.BufferedReader;
 import java.io.CharArrayReader;
 import java.io.File;
@@ -103,7 +105,7 @@ public static Document load(File file, @Nullable String charsetName, String base
      * @return Document
      * @throws IOException on IO error
      */
-    public static Document load(InputStream in, @Nullable String charsetName, String baseUri) throws IOException {
+    public static Document load(@WillClose InputStream in, @Nullable String charsetName, String baseUri) throws IOException {
         return parseInputStream(in, charsetName, baseUri, Parser.htmlParser());
     }
 
@@ -116,7 +118,7 @@ public static Document load(InputStream in, @Nullable String charsetName, String
      * @return Document
      * @throws IOException on IO error
      */
-    public static Document load(InputStream in, @Nullable String charsetName, String baseUri, Parser parser) throws IOException {
+    public static Document load(@WillClose InputStream in, @Nullable String charsetName, String baseUri, Parser parser) throws IOException {
         return parseInputStream(in, charsetName, baseUri, parser);
     }
 
@@ -134,7 +136,7 @@ static void crossStreams(final InputStream in, final OutputStream out) throws IO
         }
     }
 
-    static Document parseInputStream(@Nullable InputStream input, @Nullable String charsetName, String baseUri, Parser parser) throws IOException  {
+    static Document parseInputStream(@Nullable @WillClose InputStream input, @Nullable String charsetName, String baseUri, Parser parser) throws IOException  {
         if (input == null) // empty body
             return new Document(baseUri);
         input = ConstrainableInputStream.wrap(input, bufferSize, 0);