1 files changed, 70 insertions, 0 deletions
diff --git a/src/dk.biks.bachelorizer/dk/biks/bachelorizer/Storage.java b/src/dk.biks.bachelorizer/dk/biks/bachelorizer/Storage.java
new file mode 100644
index 0000000..95e5851
--- /dev/null
+++ b/src/dk.biks.bachelorizer/dk/biks/bachelorizer/Storage.java
@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: 2025 Jonas Smedegaard <dr@jones.dk>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package dk.biks.bachelorizer;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/// Bachelorizer - reference storage model
+abstract class Storage {
+
+	/// default constructor
+	// (declared explicitly only to silence javadoc)
+	Storage() { }
+
+	/// initialization as needed
+	abstract void initialize();
+
+	/// add student
+	///
+	/// @param name  Name of student
+	public abstract void addStudent(String name);
+
+	/// get student name
+	///
+	/// @return  name of student
+	public abstract String getStudentName();
+
+	/// resolve activity index from name
+	///
+	/// @param name  activity name
+	/// @return      index of activity as integer
+	abstract int getActivityIndeks(String name);
+
+	/// insert activity into participation
+	///
+	/// @param activityIndex  index of activity
+	abstract void addParticipation(int activityIndex);
+
+	/// list currently participating activities
+	///
+	/// @param program  programme name
+	/// @return         names of participating activities
+	abstract ArrayList<String> getParticipation(String program);
+
+	/// purge participation choices
+	abstract void clearParticipation();
+
+	/// list activities within a program
+	///
+	/// @param program  programme name
+	/// @return         names of contained activities
+	abstract ArrayList<String> selectProgram(String program);
+
+	/// sum of ECTS points under the given category
+	///
+	/// @param program  programme name
+	/// @return         ECTS points as String
+	abstract String getSumEcts(String program);
+
+	/// list of available subject modules
+	///
+	/// @return  names of all subject modules as list of strings
+	abstract List<String> getAllSubjects();
+
+	/// list of available activities
+	///
+	/// @return  names of all activities as list of strings
+	abstract ArrayList<String> getAllActivities();
+}