Made a lot of changes:

- Added interval saves for prevent data losts in crashes
- Fixed issues with MongoDB storage method
- Fixed issue with update checker only reading stable versions

dependency-reduced-pom.xml

@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.gmail.picono435</groupId>
   <artifactId>picojobs</artifactId>
-  <version>1.0-alpha-1a</version>
+  <version>1.0-alpha-1b</version>
   <build>
     <sourceDirectory>src/main/java</sourceDirectory>
     <resources>

pom.xml

@@ -3,7 +3,7 @@
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.gmail.picono435</groupId>
    <artifactId>picojobs</artifactId>
-   <version>1.0-alpha-1a</version>
+   <version>1.0-alpha-1b</version>
    <packaging>jar</packaging>
    <properties>
       <maven.compiler.source>1.8</maven.compiler.source>

src/main/java/com/gmail/picono435/picojobs/PicoJobsPlugin.java

@@ -18,6 +18,7 @@
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.bukkit.scheduler.BukkitRunnable;
+import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 import org.json.simple.parser.JSONParser;
 
@@ -50,6 +51,7 @@ public class PicoJobsPlugin extends JavaPlugin {
 	private static Plugin plugin;
 	private static PicoJobsPlugin instance;
 	private static boolean legacy;
+	private static boolean oldVersion;
 	//DATA
 	//JOBS DATA
 	public static Map<String, Job> jobs = new HashMap<String, Job>(); 
@@ -61,7 +63,6 @@ public class PicoJobsPlugin extends JavaPlugin {
 	public void onEnable() {
 		plugin = this;
 		instance = this;
-		saveDefaultConfig();
 		Bukkit.getServer();
 		sendConsoleMessage("[PicoJobs] Plugin created by: Picono435#2011. Thank you for use it.");
 		if(!verificarLicenca()) return;
@@ -73,11 +74,18 @@ public void onEnable() {
 		}
 
 		sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Creating and configuring internal files...");
+		saveDefaultConfig();
+		if(!getConfig().contains("config-version") || !getConfig().getString("config-version").equalsIgnoreCase(getDescription().getVersion())) {
+			sendConsoleMessage(ChatColor.YELLOW + "[PicoJobs] You were using a old configuration file... Updating it and removing comments, for more information check our WIKI.");
+			getConfig().options().copyDefaults(true);
+			getConfig().set("config-version", getDescription().getVersion());
+			saveConfig();
+		}
 		LanguageManager.createLanguageFile();
 		if(!FileCreator.generateFiles());
 
 
-		sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Getting data from configuration files...");
+		sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Getting data from storage...");
 		if(!generateJobsFromConfig()) return;
 		PicoJobsAPI.getStorageManager().getData();
 
@@ -116,12 +124,21 @@ public Integer call() throws Exception {
 		sendConsoleMessage(ChatColor.GREEN + "[PicoJobs] The plugin was succefully enabled.");
 
 		checkVersion();
+
+		long saveInterval = getConfig().getConfigurationSection("storage").getInt("save-interval");
+		if(saveInterval != 0) {
+			new BukkitRunnable() {
+				public void run() {
+					PicoJobsAPI.getStorageManager().saveData(false);
+				}
+			}.runTaskTimerAsynchronously(this, saveInterval, saveInterval);
+		}
 	}
 
 	public void onDisable() {
 		sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Saving data and configurations...");
 		jobs.clear();
-		PicoJobsAPI.getStorageManager().saveData();
+		PicoJobsAPI.getStorageManager().saveData(true);
 
 		sendConsoleMessage(ChatColor.GREEN + "[PicoJobs] The plugin was succefully disabled.");
 	}
@@ -142,6 +159,10 @@ public static boolean isLegacy() {
 		return legacy;
 	}
 
+	public static boolean isOldVersion() {
+		return oldVersion;
+	}
+
 	private static boolean generateJobsFromConfig() {
 		ConfigurationSection jobsc = FileCreator.getJobsConfig().getConfigurationSection("jobs");
 		for(String jobname : jobsc.getKeys(false)) {
@@ -230,7 +251,7 @@ private static boolean checkLegacy() {
 	private void checkVersion() {
 		String version = "1.0";
 		try {
-            URL url = new URL("https://api.github.com/repos/Picono435/PicoJobs/releases/latest");
+            URL url = new URL("https://api.github.com/repos/Picono435/PicoJobs/releases");
             HttpURLConnection con = (HttpURLConnection) url.openConnection();
             con.setRequestMethod("GET");
             con.setConnectTimeout(5000);
@@ -246,8 +267,8 @@ private void checkVersion() {
             in.close();
 
             JSONParser parser = new JSONParser();
-            JSONObject json = (JSONObject) parser.parse(content.toString());
-
+            JSONArray jsonArray = (JSONArray) parser.parse(content.toString());
+            JSONObject json = (JSONObject) jsonArray.get(0);
             version = (String)json.get("tag_name");
 
 		} catch(Exception ex) {
@@ -261,6 +282,7 @@ private void checkVersion() {
 				new BukkitRunnable() {
 					public void run() {
 						sendConsoleMessage(ChatColor.DARK_RED + "[PicoJobs] You are using a old version of the plugin. Please download the new version in our pages.");
+						oldVersion = true;
 						return;
 					}
 				}.runTaskLater(this, 5L);

src/main/java/com/gmail/picono435/picojobs/listeners/CreatePlayerListener.java

@@ -2,11 +2,14 @@
 
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.scheduler.BukkitRunnable;
 
 import com.gmail.picono435.picojobs.PicoJobsPlugin;
 import com.gmail.picono435.picojobs.api.JobPlayer;
+import com.gmail.picono435.picojobs.managers.LanguageManager;
 
 public class CreatePlayerListener implements Listener {
 
@@ -17,4 +20,16 @@ public void onJoin(PlayerJoinEvent e) {
 			PicoJobsPlugin.playersdata.put(p.getUniqueId(), new JobPlayer(null, 0, 1, 0, false));
 		}
 	}
+
+	@EventHandler(priority = EventPriority.MONITOR)
+	public void onCheckVersionJoin(PlayerJoinEvent e) {
+		Player p = e.getPlayer();
+		new BukkitRunnable() {
+			public void run() {
+				if(p.hasPermission("picojobs.admin") && PicoJobsPlugin.isOldVersion()) {
+					p.sendMessage("\n" + LanguageManager.formatMessage("&cYou are using an old version of PicoJobs, please update. This new version can include fixes to current errors.\n&c"));
+				}
+			}
+		}.runTaskLater(PicoJobsPlugin.getPlugin(), 20L);
+	}
 }

src/main/java/com/gmail/picono435/picojobs/managers/StorageManager.java

@@ -91,23 +91,29 @@ private void getDataInMongoDB() {
 	 * SAVE DATA METHODS 
 	 */
 	// GENERAL
-	public void saveData() {
+	public void saveData(boolean log) {
 		storageMethod = StorageMethod.getStorageMethod(PicoJobsPlugin.getPlugin().getConfig().getConfigurationSection("storage").getString("storage-method"));
 
 		if(storageMethod == StorageMethod.YAML) {
-			PicoJobsPlugin.sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Using the YAML storage method.");
+			if(log) {
+				PicoJobsPlugin.sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Using the YAML storage method.");
+			}
 			saveInConfig();
 			return;
 		}
 
 		if(storageMethod == StorageMethod.MYSQL) {
-			PicoJobsPlugin.sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Using the MySQL storage method.");
+			if(log) {
+				PicoJobsPlugin.sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Using the MySQL storage method.");
+			}
 			saveInMySQL();
 			return;
 		}
 
 		if(storageMethod == StorageMethod.MONGODB) {
-			PicoJobsPlugin.sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Using the MongoDB storage method.");
+			if(log) {
+				PicoJobsPlugin.sendConsoleMessage(ChatColor.AQUA + "[PicoJobs] Using the MongoDB storage method.");
+			}
 			saveInMongoDB();
 			return;
 		}
@@ -118,14 +124,13 @@ public void saveData() {
 
 	// YAML
 	private void saveInConfig() {
-		if(FileCreator.getDataFile() != null) {
-			FileCreator.getDataFile().delete();
-		}
-		if(!FileCreator.createDataFile()) return;
 		ConfigurationSection playerDataCategory = FileCreator.getData().getConfigurationSection("playerdata");
 		for(UUID uuid : PicoJobsPlugin.playersdata.keySet()) {
 			JobPlayer jp = PicoJobsPlugin.playersdata.get(uuid);
-			ConfigurationSection player = playerDataCategory.createSection(uuid.toString());
+			ConfigurationSection player = playerDataCategory.getConfigurationSection(uuid.toString());
+			if(player == null) {
+				player = playerDataCategory.createSection(uuid.toString());
+			}
 			if(jp.getJob() == null) {
 				player.set("job", null);
 			} else {

src/main/java/com/gmail/picono435/picojobs/utils/MongoDBAPI.java

@@ -37,8 +37,9 @@ public boolean openConnection(){
         return true;
     }
 
-	public void addINDB(final String uuid, final String job, final double method, final double level, final double salary, final boolean isWorking) {
+	public void addINDB(final String uuid, String job, final double method, final double level, final double salary, final boolean isWorking) {
 		Document obj = new Document("uuid", uuid);
+		if(job == null) job = "";
         obj.put("job", job);
         obj.put("method", method);
         obj.put("level", level);

src/main/resources/config.yml

@@ -8,6 +8,9 @@
 # Here you will only find basic configurations
 # IMPORTANT #
 
+# DO NOT CHANGE THIS
+config-version: ${project.version}
+
 #################################################################################
 #                                                                               #
 # Important configurations                                                      #
@@ -33,6 +36,8 @@ storage:
   # MySQL - Save the data in a MySQL database
   # MongoDB - Save the data in a MongoDB database
   storage-method: YAML
+  # Here you should put how many ticks should be the interval between saves, put 0 to disable
+  save-interval: 0
   # MySQL configuration, required only if the storage method is MySQL
   mysql:
     host: localhost