Start adding implementation

.gitignore

@@ -22,3 +22,8 @@
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 replay_pid*
+
+
+.gradle
+
+build

src/main/java/dev/zontreck/eventsbus/Cancellable.java

@@ -0,0 +1,11 @@
+package dev.zontreck.eventsbus;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(value = RetentionPolicy.RUNTIME)
+@Target(value = ElementType.TYPE)
+public @interface Cancellable {
+}

src/main/java/dev/zontreck/eventsbus/Event.java

@@ -1,7 +1,37 @@
 package dev.zontreck.eventsbus;
 
+public class Event {
+    private boolean cancelled = false;
 
-public class Event
-{
-    
+    /**
+     * Checks if the event can be cancelled.
+     * 
+     * @see Cancellable
+     * @return True if the cancellation annotation is present.
+     */
+    public boolean IsCancellable() {
+        Class<?> Current = this.getClass();
+        return Current.isAnnotationPresent(Cancellable.class);
+    }
+
+    /**
+     * Checks if the event is cancelled.
+     * 
+     * @return False if the event cannot be cancelled, or returns the current status
+     *         for the event.
+     */
+    public boolean isCancelled() {
+        if (!IsCancellable())
+            return false;
+        return cancelled;
+    }
+
+    /**
+     * Sets the cancelled status for the event
+     * 
+     * @param cancel Whether the event should be marked as cancelled or not.
+     */
+    public void setCancelled(boolean cancel) {
+        cancelled = cancel;
+    }
 }

src/main/java/dev/zontreck/eventsbus/Priority.java

@@ -0,0 +1,9 @@
+package dev.zontreck.eventsbus;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(value = RetentionPolicy.RUNTIME)
+public @interface Priority {
+    public PriorityLevel Level = PriorityLevel.LOW;
+}

src/main/java/dev/zontreck/eventsbus/PriorityLevel.java

@@ -0,0 +1,15 @@
+package dev.zontreck.eventsbus;
+
+/**
+ * Event priority level.
+ * 
+ * The higher the priority, the sooner it gets executed. High is executed after
+ * Highest.
+ */
+public enum PriorityLevel {
+    HIGHEST,
+    HIGH,
+    MEDIUM,
+    LOW,
+    LOWEST
+}