introduce FileFlag

Author: burdoto

src/main/java/org/comroid/api/io/FileFlag.java

@@ -0,0 +1,15 @@
+package org.comroid.api.io;
+
+import java.io.File;
+
+public final class FileFlag {
+    public static boolean consume(File file) {
+        if (!file.isAbsolute())
+            return consume(file.getAbsoluteFile());
+        return file.exists() && file.delete();
+    }
+
+    private FileFlag() {
+        throw new UnsupportedOperationException();
+    }
+}