Added solution to problem 1

Problems/Problem.ts

@@ -0,0 +1,66 @@
+//ProjectEulerTS/Problems/Problem.ts
+//Matthew Ellison
+// Created: 10-18-20
+//Modified: 10-18-20
+//What is the sum of all the multiples of 3 or 5 that are less than 1000
+//Unless otherwise listed all non-standard includes are my own creation and available from https://bibucket.org/Mattrixwv/typescriptClasses
+/*
+	Copyright (C) 2020  Matthew Ellison
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { Stopwatch } from "../../../Typescript/typescriptClasses/Stopwatch";
+import { Unsolved } from "../Unsolved";
+
+
+export abstract class Problem{
+	//Variables
+	private description: string;
+	protected timer: Stopwatch = new Stopwatch();
+	protected solved: boolean;
+
+	//Constructor
+	public constructor(description: string){
+		this.description = description;
+		this.solved = false;
+	}
+	//Gets
+	getDescription(){
+		return this.description;
+	}
+	//Returns the result of solving the problem
+	public abstract getResult(): string;
+	//Returns the time taken to run the problem as a string
+	public getTime(): string{
+		if(!this.solved){
+			throw new Unsolved();
+		}
+		return this.timer.getStr();
+	}
+	//Returns the timer as a stopwatch
+	public getTimer(): Stopwatch{
+		if(!this.solved){
+			throw new Unsolved();
+		}
+		return this.timer;
+	}
+	//Solve the problem
+	public abstract solve(): void;
+	//Reset the problem so it can be run again
+	public reset(): void{
+		this.timer.reset();
+		this.solved = false;
+	}
+}