Abstract Data storage method for future implementations. Thanks to Ryan from Reactive MC

Also included:
-Heavily optimized loading process
-Optimizations for various commands.

src/main/java/com/massivecraft/factions/cmd/CmdConvert.java

@@ -0,0 +1,39 @@
+package com.massivecraft.factions.cmd;
+
+import org.bukkit.command.ConsoleCommandSender;
+
+import com.massivecraft.factions.Conf;
+import com.massivecraft.factions.Conf.Backend;
+import com.massivecraft.factions.zcore.persist.json.FactionsJSON;
+
+public class CmdConvert extends FCommand {
+
+    public CmdConvert() {
+        this.aliases.add("convert");
+
+        this.requiredArgs.add("[MYSQL|JSON]");
+    }
+
+    @Override
+    public void perform() {
+        if (!(this.sender instanceof ConsoleCommandSender)) {
+            this.sender.sendMessage("Console only command");
+        }
+        Backend nb = Backend.valueOf(this.argAsString(0).toUpperCase());
+        if (nb == Conf.backEnd) {
+            this.sender.sendMessage("Already running that backend");
+            return;
+        }
+        switch (nb) {
+            case JSON:
+                FactionsJSON.convertTo();
+                break;
+            default:
+                this.sender.sendMessage("Invalid backend");
+                return;
+            
+        }
+        Conf.backEnd = nb;
+    }
+
+}