[jvm-lang] add JvmPackage

java/java-psi-api/src/com/intellij/lang/jvm/JvmPackage.java

@@ -0,0 +1,32 @@
+// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.intellij.lang.jvm;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Represents a package.
+ *
+ * @see Package
+ */
+public interface JvmPackage extends JvmAnnotatedElement, JvmNamedElement {
+
+  /**
+   * @return the name, or {@code null} for the default package
+   */
+  @Nullable("default package")
+  @Override
+  String getName();
+
+  /**
+   * @return the fully qualified name, or an empty string for the default package
+   */
+  @NotNull
+  String getQualifiedName();
+
+  /**
+   * @return the parent package, or {@code null} for the default package
+   */
+  @Nullable
+  JvmPackage getParentPackage();
+}