Add empty ConfigSection

Plugin/src/main/java/me/filoghost/chestcommands/config/framework/ConfigSection.java

@@ -76,6 +76,7 @@ public class ConfigSection {
 	}
 
 	private void setRawValue(String path, Object value) {
+		Preconditions.checkArgument(!(value instanceof ConfigurationSection), "cannot set ConfigurationSection as value");
 		yamlSection.set(path, value);
 	}
 

Plugin/src/main/java/me/filoghost/chestcommands/config/framework/EmptyConfigSection.java

@@ -0,0 +1,25 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package me.filoghost.chestcommands.config.framework;
+
+import org.bukkit.configuration.MemoryConfiguration;
+
+public class EmptyConfigSection extends ConfigSection {
+
+	public EmptyConfigSection() {
+		super(new MemoryConfiguration());
+	}
+
+}