Created basic ban functionality (IP bans not yet supported)

src/main/java/com/redstoner/bungeeBans/BanManager.java

@@ -0,0 +1,66 @@
+package com.redstoner.bungeeBans;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonSyntaxException;
+import com.redstoner.bungeeBans.json.Ban;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class BanManager<T extends Ban> {
+	private Gson gson = new Gson();
+	private File file;
+
+	private Class<T> type;
+
+	private List<T> bans = new ArrayList<>();
+
+	BanManager(File file, Class<T> type) {
+		this.file = file;
+		this.type = type;
+	}
+
+	public void loadBans() throws JsonSyntaxException, IOException {
+		String json = new String(Files.readAllBytes(file.toPath()));
+
+		try {
+			@SuppressWarnings ("unchecked")
+			T[] bans = gson.fromJson(json, (Class<T[]>) java.lang.reflect.Array.newInstance(type, 0).getClass());
+			if (bans != null) this.bans.addAll(Arrays.asList(bans));
+		} catch (ClassCastException e) {
+			//IGNORE
+			e.printStackTrace();
+		}
+	}
+
+	public void saveBans() throws IOException {
+		String json = gson.toJson(bans);
+
+		FileOutputStream outputStream = new FileOutputStream(file);
+		outputStream.write(json.getBytes());
+		outputStream.close();
+	}
+
+	public void addBan(T ban) {
+		this.bans.add(ban);
+	}
+
+	public void removeBan(T ban) {
+		this.bans.remove(ban);
+	}
+
+	public T getBan(String identifier) {
+		for (T ban : bans) {
+			if (ban.getIdentifier().equals(identifier)) {
+				return ban;
+			}
+		}
+
+		return null;
+	}
+}