Fix warnings about encoding

Author: ctrueden

src/main/java/org/scijava/search/web/BISESearcher.java

@@ -67,7 +67,7 @@ public List<SearchResult> search(final String text, final boolean fuzzy) {
 		try {
 			// URL url = new URL("file:///c:/structure/temp/biii.eu_search2.html");
 			final URL url = new URL("http://biii.eu/search?search_api_fulltext=" +
-				URLEncoder.encode(text) + "&source=imagej");
+				URLEncoder.encode(text, "utf-8") + "&source=imagej");
 
 			final DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
 			final DocumentBuilder db = dbf.newDocumentBuilder();

src/main/java/org/scijava/search/web/ImageJForumSearcher.java

@@ -60,8 +60,8 @@ public ImageJForumSearcher() {
 	@Override
 	public List<SearchResult> search(final String text, final boolean fuzzy) {
 		try {
-			final URL url = new URL("http://forum.imagej.net/search?q=" + URLEncoder
-				.encode(text) + "&source=imagej");
+			final URL url = new URL("http://forum.imagej.net/search?q=" + //
+				URLEncoder.encode(text, "utf-8") + "&source=imagej");
 			final Scanner s = new Scanner(url.openStream());
 			s.useDelimiter("\"topics\":");
 

src/main/java/org/scijava/search/web/WikiSearcher.java

@@ -69,7 +69,7 @@ public List<SearchResult> search(final String text, final boolean fuzzy) {
 		try {
 			final URL url = new URL(
 				"http://imagej.net/index.php?title=Special%3ASearch&search=" +
-					URLEncoder.encode(text) + "&go=Search&source=imagej");
+					URLEncoder.encode(text, "utf-8") + "&go=Search&source=imagej");
 
 			final DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
 			final DocumentBuilder db = dbf.newDocumentBuilder();