Added checkstyle and fixed issues

simpleexample/config/checkstyle/google_checks.xml

@@ -46,10 +46,12 @@
             <property name="allowByTailComment" value="true"/>
             <property name="allowNonPrintableEscapes" value="true"/>
         </module>
+        <!--
         <module name="LineLength">
             <property name="max" value="100"/>
             <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
         </module>
+        -->
         <module name="AvoidStarImport"/>
         <module name="OneTopLevelClass"/>
         <module name="NoLineWrap"/>
@@ -242,10 +244,12 @@
         <module name="JavadocMethod">
             <property name="scope" value="public"/>
             <property name="allowMissingParamTags" value="true"/>
-            <property name="allowMissingThrowsTags" value="true"/>
             <property name="allowMissingReturnTag" value="true"/>
             <property name="allowedAnnotations" value="Override, Test"/>
+            <!-- Not supported anymore
+            <property name="allowMissingThrowsTags" value="true"/>
             <property name="allowThrowsTagsForSubclasses" value="true"/>
+            -->
         </module>
         <!-- Removed due to instantiation exception
         <module name="MissingJavadocMethod">

simpleexample/pom.xml

@@ -103,7 +103,29 @@
 				<configuration>
 					<mainClass>simpleex.ui.FxApp</mainClass>
 				</configuration>
-			</plugin>
+            </plugin>
+            <!-- Run the checkstyle code quality tool -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <configLocation>config/checkstyle/google_checks.xml</configLocation>
+                    <encoding>UTF-8</encoding>
+                    <consoleOutput>true</consoleOutput>
+                    <failsOnError>true</failsOnError>
+                    <linkXRef>false</linkXRef>
+                </configuration>
+                <executions>
+                    <execution>
+                    <id>validate</id>
+                    <phase>validate</phase>
+                    <goals>
+                        <goal>check</goal>
+                    </goals>
+                    </execution>
+                </executions>
+                </plugin>
 		</plugins>
 	</build>
 </project>

simpleexample/src/main/java/simpleex/core/LatLong.java

@@ -80,8 +80,8 @@ public class LatLong {
   /**
    * Creates a LatLong object from a String, using a specific separator.
    * The format is <latitude><separator><longitude>.
-   * @param s
-   * @param sep
+   * @param s the string to parse
+   * @param sep the separator to use between latitude, longitude elements
    * @return
    */
   public static LatLong valueOf(final String s, final String sep) {

simpleexample/src/main/java/simpleex/core/LatLongs.java

@@ -9,7 +9,8 @@ public class LatLongs implements Iterable<LatLong> {
 
   final List<LatLong> latLongs = new ArrayList<>();
 
-  public LatLongs() {}
+  public LatLongs() {
+  }
 
   public LatLongs(final double... latLongsArray) {
     addLatLongs(latLongsArray);

simpleexample/src/main/java/simpleex/ui/FxAppController.java

@@ -84,7 +84,7 @@ public class FxAppController {
     // map stuff
     // mapView.getChildren().add(MapTileLayer.getOpenStreetMapLayer());
     zoomSlider.valueProperty()
-    .addListener((prop, oldValue, newValue) -> mapView.setZoomLevel(zoomSlider.getValue()));
+        .addListener((prop, oldValue, newValue) -> mapView.setZoomLevel(zoomSlider.getValue()));
     zoomSlider.setValue(8);
     markersParent = new MapItemsControl<MapNode>();
     mapView.getChildren().add(markersParent);
@@ -192,7 +192,7 @@ public class FxAppController {
     final FileChooser fileChooser = getFileChooser();
     final File selection = fileChooser.showOpenDialog(null);
     if (selection != null) {
-      try (InputStream input = new FileInputStream(selection) ){
+      try (InputStream input = new FileInputStream(selection)) {
         setLatLongs(getObjectMapper().readValue(input, LatLongs.class));
       } catch (final IOException e) {
         showExceptionDialog("Oops, problem when opening " + selection, e);
@@ -227,7 +227,7 @@ public class FxAppController {
   void handleSaveAction() {
     final FileChooser fileChooser = getFileChooser();
     final File selection = fileChooser.showSaveDialog(null);
-    if (selection != null ) {
+    if (selection != null) {
       try (OutputStream outputStream = new FileOutputStream(selection, false)) {
         getObjectMapper().writeValue(outputStream, getLatLongs());
       } catch (final IOException e) {