Adds the ability to add internet songs to the library.

interface/src/main/java/edu/regis/universeplayer/data/DatabaseManager.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2021 William Hubbard. All Rights Reserved.
+ */
+
+package edu.regis.universeplayer.data;
+
+import edu.regis.universeplayer.player.Interface;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.SQLWarning;
+
+/**
+ * Manages the application song database
+ */
+public class DatabaseManager
+{
+    private static final Logger logger = LoggerFactory.getLogger(DatabaseManager.class);
+    private static Connection db;
+    
+    public static synchronized Connection getDb()
+    {
+        SQLWarning warning;
+        try
+        {
+            if (db == null || db.isClosed())
+            {
+                Class.forName("org.sqlite.JDBC");
+                db = DriverManager.getConnection("jdbc:sqlite:" + new File(Interface.getDataDir().getAbsolutePath(), "universalmusic.db").getAbsolutePath());
+            }
+            warning = db.getWarnings();
+            while (warning != null)
+            {
+                logger.warn("SQL Warning: ", warning);
+                warning = warning.getNextWarning();
+            }
+            db.clearWarnings();
+        }
+        catch (SQLException | ClassNotFoundException e)
+        {
+            logger.error("Could not store caching DIR.");
+        }
+        return db;
+    }
+}