More stuff.

common-plugin/src/main/kotlin/gay/pizza/foundation/common/BaseFoundationPlugin.kt

@@ -0,0 +1,21 @@
+package gay.pizza.foundation.common
+
+import org.bukkit.command.CommandExecutor
+import org.bukkit.command.TabCompleter
+import org.bukkit.plugin.java.JavaPlugin
+
+abstract class BaseFoundationPlugin : JavaPlugin() {
+  fun registerCommandExecutor(name: String, executor: CommandExecutor) {
+    registerCommandExecutor(listOf(name), executor)
+  }
+
+  fun registerCommandExecutor(names: List<String>, executor: CommandExecutor) {
+    for (name in names) {
+      val command = getCommand(name) ?: throw Exception("Failed to get $name command")
+      command.setExecutor(executor)
+      if (executor is TabCompleter) {
+        command.tabCompleter = executor
+      }
+    }
+  }
+}