YamlStoreFactory added.

Example usage:
StoreFactory factory = new YamlStoreFactory(new File("regions"), "worlds/%s/regions.yml"));

src/main/java/com/sk89q/worldguard/region/stores/YamlStoreFactory.java

@@ -0,0 +1,108 @@
+// $Id$
+/*
+ * This file is a part of WorldGuard.
+ * Copyright (c) sk89q <http://www.sk89q.com>
+ * Copyright (c) the WorldGuard team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY), without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldguard.region.stores;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Formatter;
+
+import org.apache.commons.lang.Validate;
+
+/**
+ * Creates {@link YamlStore}s.
+ *
+ * @see YamlStore
+ */
+public class YamlStoreFactory implements RegionStoreFactory {
+
+    private File baseDir;
+    private String pathFormat;
+
+    public YamlStoreFactory(File baseDir, String pathFormat) {
+        setBaseDir(baseDir);
+        setPathFormat(pathFormat);
+    }
+
+    /**
+     * Get the base directory to store the region files.
+     *
+     * @return the base directory
+     */
+    public File getBaseDir() {
+        return baseDir;
+    }
+
+    /**
+     * Set the base directory store the region files.
+     *
+     * @param baseDir base directory
+     */
+    public void setBaseDir(File baseDir) {
+        Validate.notNull(baseDir, "Base directory parameter cannot be null");
+        this.baseDir = baseDir;
+    }
+
+    /**
+     * Get the path format for region files.
+     *
+     * @return path format
+     * @see #setPathFormat(String) for an explanation of the format
+     */
+    public String getPathFormat() {
+        return pathFormat;
+    }
+
+    /**
+     * Set the path format for region files.
+     * <p>
+     * The path format is a string where %s will be replaced with the region
+     * set ID. For example, "worlds/%s/regions.yml" would be a valid format.
+     * {@link Formatter} is used to format the format and % does have to be escaped.
+     *
+     * @param pathFormat the format
+     * @see Formatter
+     */
+    public void setPathFormat(String pathFormat) {
+        Validate.notNull(pathFormat, "Path format cannot be null");
+        this.pathFormat = pathFormat;
+    }
+
+    /**
+     * Get the file that is used to store the data for the given ID.
+     *
+     * @param id the ID
+     * @return the file object
+     */
+    public File getFile(String id) {
+        Validate.notNull(id, "ID cannot be null");
+        return new File(baseDir, String.format(pathFormat, id));
+    }
+
+    @Override
+    public RegionStore getStore(String id) {
+        Validate.notNull(id, "ID cannot be null");
+        return new YamlStore(getFile(id));
+    }
+
+    @Override
+    public void close() throws IOException {
+        // Nothing to do
+    }
+
+}