private final <T extends TileEntity> Class<T> tileEntityClass;

public <T extends TileEntity> MyClass(Class<T> tileEntityClass) {
	this.tileEntityClass = tileEntityClass;
}

// My function got creating a new instance of the TileEntity.
public <T extends TileEntity> T getTileEntity() {
            return tileEntityClass.newInstance();
        } catch(Exception e) {
            e.printStackTrace();
        }

        return null;
    }
}